CURRENT PRACTICE         

• 01/02/2002-present

Consultant Pediatric Gastroenterologist – Hepatologist

Head of Hepatology Clinic

Lecturer in Pediatrics 2004-2007, University of Athens

First Pediatric Clinic, Aghia Sophia Children’s Hospital

Thivon & Levadeias Street Athens, 11527 Greece

•  9/1/2003-present

Director of Ped. GI Division

MITERA Children’s Hospital, Erythrou Stavrou 6, Maroussi

Tel : (210) 6869900

 Private office: 8 Marathonos Street. Chalandri, Athens, Greece 10675

Tel: 30+(210) 7293277  Fax: 30+(210) 7229754

PREVIOUS APPOINTMENTS

• 2000-2012                  

Visiting Assistant Professor of Pediatrics

Division of Pediatric Gastroenterology & Nutrition

The Johns Hopkins Hospital, Brady 320, 600 North Wolfe Street, Baltimore, M.D. 21205

• 1999-2000                  

Assistant Professor of Pediatrics

Division of Pediatric Gastroenterology & Nutrition

The Johns Hopkins Hospital

Johns Hopkins University School of Medicine Brady 320, 600 North Wolfe Street, 

Baltimore, M.D. 21205

•  1999-2002                  

Attending Pediatric Gastroenterologist

Kennedy Kreiger Institute

Division of Feeding and Swallowing Disorders, 707 North Broadway, Baltimore, MD 21205

EDUCATION/ POSTDOCTORAL TRAINING

•  1985-1989

Bachelor of Science
Major: Biology
University of Maryland, College Park, MD.

• 1989-1993

Doctor of Medicine
Georgetown University School of Medicine, Washington, D.C.

• 1993-1996

Residency in Pediatrics
Georgetown University Medical Center, Washington, D.C.         

• 1996-1999

Fellowship in Pediatric Gastroenterology & Nutrition
Johns Hopkins University School of Medicine, Baltimore, M.D.

• 2002-2007

Postdoctorate Degree (PhD)
National and Kapodistrian University of Athens, School of Medicine

Thesis: A study of cellular immunity via measurement of cytokine secretion in children and adolescents with chronic hepatitis C infection.

BOARD CERTIFICATION

• 1994

Diplomate of the National Board of Medical Examiners (NBME 1, USMLE 2, USMLE 3)

• 1996

American Board of Pediatrics

• 1999

American Board of Pediatrics, Subboard of Pediatric Gastroenterology

LICENSURE

•  1993-1996

Washington DC

•  1999

State of Maryland

• 2002

Greek Medical Society of Athens (ISA) # 051313

Perfecture of Attica  Protocol number 3762/28.1.2002

 HONORS AND AWARDS

• 1986

Golden Key National Honor Society                           

Phi Eta Sigma Freshman Honor Society

•  1988

Phi Kappa Phi National Honor Society 

Phi Sigma Biological Honor Society

•  1989

Phi Beta Kappa

•  1993

The Philip Calcagno, M.D.  Award for outstanding third year student in Pediatrics, Georgetown University Medical Center

• 1996

Resident of the Year Award for outstanding Resident, Department of Pediatrics,

Georgetown University Medical Center

• 1998

NASPGHAN-Janssen Fellow Travel Award for abstract presentation in NASPGHAN-ESPGHAN, 5th Joint Meeting: Toulouse, France

• 1999

American Liver Foundation Pediatric Fellow Research Award for submitted abstract inthe AASLD meeting in 1999 in Dallas, Texas entitled «Decreased interleukin-12 secretion in children with hemophilia and hepatitis C virus infection. Hepatology 2000; 32(4) pt 2».

•  2016               

Matsaniotis Award, Greek Pediatric Society for the best submitted abstract at the 54^th Annual Panhellenic Pediatric Society Meeting held in Ioannina, 17-19 June 2016, entitled “ Exploring the use of shear wave 2D elastography (SWE2D) in the diagnosis of liver fibrosis of various liver diseases in children”.  Authors: Galina P, Zellou A, Lykopoulou L, Patereli A, Zarifi M.

UNIVERSITY TEACHING SERVICE

• 1995-1996    

Member of Task Force Committee on the Georgetown University Primary Care Curriculum for the Undergraduate Medical Education

• 2006-present                         

Teaching 2nd year of medical school students in the elective lesson entitiled ‘’The use of English language in Pediatrics’’

• 2006-present                         

Teaching 6^th year Medical students and Pediatric Residents  in the elective lesson of ‘’Pediatric Gastroenterology ‘’ University of Athens School of Medicine.

• 2015-present

Teaching 2^nd year Medical School elective in “Gastroenterology, Pediatric Gastroenterology” 

GREEK GOVERNMENT COMMITTEE SERVICE

• 2004-2016     

Member of the Viral Hepatitis Committee –National Center of Disease Control And Prevention (ΚΕΕLPNΟ)- Greek Ministry Health

• 2008-2010  

Member of the Executive Board of the Greek National Institution of Social Insurance (ΙΚΑ-ΕΤΑΜ), Greek Ministry of Labor

• 2014

Member of the Ministry of Health Committee, representing Pediatric Gastroenterology, establishment of Pediatric Subspecialties in Greece, Greek Ministry Health

MEMBERSHIPS IN PROFESSIONAL SOCIETIES                 

• 1993-2000

American Medical Association

• 1995-2000

American Academy of Pediatrics

• 2002-present                         

Member of Greek Medical Society (#51313)

• 2008-present             
  

Member Hellenic Gastroenterological Association

• 2006-present                         

Executive Board of Hellenic Society of Pediatric Gastroenterology                    

Hepatology and Nutrition (HELSPGHAN)

President (2017-2019)

General Secretary (2012-2017)

Vice President (2010-2012)

Treasurer (2006-2010)                                

• 2011-present                         

Member, European Society of Pediatric Gastroenterology Hepatology and Nutrition (ESPGHAN)

ESPGHAN Working Groups on Epigenetics, Pediatric Hepatology, Wilson disease, NAFLD

• 2018-2023

Appointed Member of the ESPGHAN Hepatology Committee

• 1997-present                         

Member (1997-2000)

International member (2000-present), North American Society of Pediatric Gastroenterology Hepatology and Nutrition (NASPGHAN)

RESEARCH GRANTS

• 1997-1999      

NIH/NIAD Grant U19 A1 40035: Pathogenesis of HCV Infections among IVDUs. $500,000-Co investigator-100% fellowship salary. Investigator: David Thomas MD, Co-investigator: Kathleen B. Schwarz MD.

Schering-Plough Pharmaceuticals. $3,000 awarded towards Hepatitis C research.

• 1997-2000      

Johns Hopkins University School of Medicine Pediatric Clinical Research Unit Grant # 97-10-17-02.  Multicenter treatment trial of hemophiliac children with interferon and ribavirin. Sponsored by the National hemophilia Foundation and Schering-Plough Corporation. Co-investigator. (PI: Kathleen B.Schwarz MD)

Johns Hopkins University School of Medicine Pediatric Clinical Research Unit Grant #97101702: The natural history of hepatitis C virus infection in children. Co-investigator. (PI: Kathleen B.Schwarz MD)

• 2002               

Procter & Gamble award entitled «Health & Child award»: $10,000 for completion of Postdoctoral thesis entitled : ‘’A study of cellular immunity via measurement of cytokine secretion in children and adolescents with chronic hepatitis C infection’’.

ORGANIZATION OF SCIENTIFIC MEETINGS

• 2020 ESPGHAN Monothematic Conference in Acute Liver Failure, Athens, Greece, January 30-February 1, 2020

Local Organizer Chair

Member of  ESPGHAN Hepatology Committee

• 2018 First Panhellenic Pediatric GI Society Meeting (HELSPGHAN), Athens, October 12-14, 2018

President of HELSPGHAN

Organizer

• 2017 17th Pediatric GI Society Meeting (HELSPGHAN), Athens, December 2, 2017  

President of HELSPGHAN, Local Co-organizer

• 2017 First Pediatric Nutrition Conference, HELSPGHAN, Athens, April 1, 2017

General Secretary HELSPGHAN, Local Co-organizer

• 2016 ESPGHAN/UEG –Hands on Endoscopy Course, Athens

Instructor in liver biopsies

• 2016 ESPGHAN 49^th Annual Meeting in Athens

Member of the local organizing committee, Chairperson, Speaker

• 2014 First Pediatric Hepatology Meeting. “Common Problems in Pediatric Hepatology: Meet the specialist”, Horemeio Amphitheater, Aghia Sophia Children’s Hospital, Athens Greece, February 1, 2014
  hosted by HELSPGHAN,

Member of the Organizing Committee

•  2013 13th Panhellenic Pediatric Society Meeting (HELSPGHAN), Athens, November 30, 2013  

President of the Organizing Committee

• 2013 Satellite Symposium of Pediatric Gastroenterology: “ Old Ideas For New Health Problems And New Ideas For Old Health Problems: From Intestinal Failure To The Benefits Of Probiotics”, King George Hotel, Athens, November 30, 2013, hosted by HELSPGHAN and Nestle Nutrition Institute (NNI)

Chairman and Organizer

PUBLIC SERVICE-VOLUNTEERING

•  2017-present

AXIONHELLAS, NPO: we support society

a non-profit organization that provides medical services, educational/cultural  activities and builds infrastructure in remote islands and remote areas of the mainland of Greece  www.axionhellas.gr

Vice President of the Executive Board

Founding Member

Coordinator and Scientific Director of the Medical Team

• 2021-present

President of the Executive Board

PUBLICATIONS

JOURNALS

• Indolfi G, Czubkowski P, Fitzpatrick E, Gonzales E, Gupte G, Mancell S, Mozer-Glassberg Y, Nicastro E, Norman J, Stephenne X, Zellos A, Marianne S. Summary of the Current Knowledge on Acute Hepatitis of Unknown Aetiology Among Young Children in UK, Europe and US: a Paper by the Hepatology Committee of the ESPGHAN Accepted to Journal of Pediatric Gastroenterology Hepatology and Nutrition
• Zellos A, Debray D, Indolfi G, Czubkowski P, Samyn M, Hadzic N, Gupte G, Fischler B, Smets F, de Cléty SC, Grenda R, Mozer Y, Mancell S, Jahnel J, Auzinger G, Worth A, Lisman T, Staufner C, Baumann U, Dhawan A, Alonso E, Squires RH, Verkade HJ. Proceedings of ESPGHAN Monothematic Conference 2020: “Acute Liver Failure in Children”: Diagnosis and Initial Management. J Pediatr Gastroenterol Nutr. 2022 Mar 1;74(3):e45-e56. doi: 10.1097/MPG.0000000000003341. PMID: 35226643.
• Zellos A, Debray D, Indolfi G, Czubkowski P, Samyn M, Hadzic N, Gupte G, Fischler B, Smets F, Clément de Cléty S, Grenda R, Mozer Y, Mancell S, Jahnel J, Auzinger G, Worth A, Lisman T, Staufner C, Baumann U, Dhawan A, Alonso E, Squires RH, Verkade HJ. Proceedings of the European Society for Pediatric Gastroenterology, Hepatology and Nutrition Monothematic Conference, 2020: “Acute Liver Failure in Children”: Treatment and Directions for Future Research. J Pediatr Gastroenterol Nutr. 2022 Mar 1;74(3):338-347. doi: 10.1097/MPG.0000000000003345. PMID: 35226644.
• Chouliaras GL, Krepis P, Bouzios I, Zellos A, Chrousos G, Roma-Giannikou E. Dietary habits in Greek children with functional constipation based on Rome III criteria: a school-based, cross-sectional multivariate analysis. Ann Gastroenterol. 2021 Jul-Aug;34(4):528-534. doi: 10.20524/aog.2021.0626. Epub 2021 Apr 3. PMID: 34276192; PMCID: PMC8276364.
• Galina P, Alexopoulou E, Mentessidou A, Mirilas P, Zellos A, Lykopoulou L, Patereli A, Salpasaranis K, Kelekis NL, Zarifi M. Diagnostic accuracy of two-dimensional shear wave elastography in detecting hepatic fibrosis in children with autoimmune hepatitis, biliary atresia and other chronic liver diseases. Pediatr Radiol. 2021 Jul;51(8):1358-1368. doi: 10.1007/s00247-020-04959-9. Epub 2021 Mar 23. PMID: 33755748.
• Indolfi G, Abdel-Hady M, Bansal S, Debray D, Smets F, Czubkowski P, van der Woerd W, Samyn M, Jahnel J, Gupte G, Zellos A, Mozer-Glassberg Y, Verkade HJ, Sokal E, Fischler B. Management of Hepatitis B Virus Infection and Prevention of Hepatitis B Virus Reactivation in Children With Acquired Immunodeficiencies or Undergoing Immune Suppressive, Cytotoxic, or Biological Modifier Therapies. J Pediatr Gastroenterol Nutr. 2020 Apr;70(4):527-538. doi: 10.1097/MPG.0000000000002628. PMID: 31977956.
• Giannakopoulos G, Margoni D, Chouliaras G, Panayiotou J, Zellos A, Papadopoulou A, Liakopoulou M, Chrousos G, Kanaka-Gantenbein C, Kolaitis G, Roma E. Child and Parent Mental Health Problems in Pediatric Celiac Disease: A Prospective Study. J Pediatr Gastroenterol Nutr. 2020 Sep;71(3):315-320. doi: 10.1097/MPG.0000000000002769. PMID: 32404753.
• Galina P, Alexopoulou E, Zellos A, Grigoraki V, Siahanidou T, Kelekis NL, Zarifi M. Performance of two–dimensional ultrasound shear wave elastography: reference values of normal liver stiffness in children. Pediatr Radiol. 2019 Jan;49(1):91-98. doi: 10.1007/s00247-018-4244-3. Epub 2018 Sep 28
• Zilbauer M, Zellos A, Heuschkel R, Gasparetto M, Kraiczy J, Postberg J, Greco L, Auricchio R, Galatola M, Embleton N, Wirth S, Jenke A. Epigenetics in Paediatric Gastroenterology, Hepatology and Nutrition – Current Trends and Future Perspectives. J Pediatr Gastroenterol Nutr. 2015 Nov 26. [Epub ahead of print] PMID: 26628441
• Koutsochristou V, Zellos A, Dimakou K, Panayotou I, Siahanidou S, Roma-Giannikou E, Tsami A. Dental Caries and Periodontal Disease in Children and Adolescents with Inflammatory Bowel Disease: A Case-Control Study.Inflamm Bowel Dis. 2015 May 15. [Epub ahead of print] PMID: 25985243
• Vassiliki P, Ioanna K, Artemis V, Eleni K, Aglaia Z, Attilakos A, Maria T, Dimitris K. Determinants of vaccination coverage and adherence to the Greek national immunization program among infants aged 2-24 months at the beginning of the economic crisis (2009-2011). BMC Public Health. 2014 Nov 20;14:1192. doi: 10.1186/1471-2458-14-1192. PMID: 25413589; PMCID: PMC4256824.
• Karagiozoglou-Lampoudi T, Zellos A, Vlahavas G, Kafritsa Y, Roma E, Papadopoulou A, Fotoulaki M, Karyda S, Xinias I, Savvidou A. Screening for coeliac disease in preschool Greek children: the feasibility study of a community-based project. Acta Paediatr. 2013 Apr 22. doi: 10.1111/apa.12241
• Charalampopoulos D, Panayiotou J, Chouliaras G, Zellos A, Kyritsi E, Roma E. Determinants of adherence to gluten-free diet in Greek children with coeliac disease: a cross-sectional study.Eur J Clin Nutr. 2013 Mar 6. doi: 10.1038/ejcn.2013.54. [Epub ahead of print]
• Zellos A, Spoulou V, Roma-Giannikou E, Karentzou O, Dalekos GN, Theodoridou M. Autoimmune hepatitis type-2 and Epstein-Barr virus infection in a toddler: art of facts or an artefact? Ann Hepatol 2013 Jan-Feb;12(1):147-51.
• Zellos A, Zarganis D, Ypsiladis S, Chatzis D, Papaioannou G, Bartsocas C. Malrotation of the intestine and chronic volvulus as a cause of protein-losing enteropathy in infancy. Pediatrics. 2012 Feb;129(2):e515-8. Epub 2012 Jan 23.
• Zellos A, Lykopoulou L, Polydorou A, Tanou K, Jirsa M, Roma E, Knisely AS. Nasobiliary drainage in an episode of intrahepatic cholestasis in a child with mild ABCB11 disease. J Pediatr Gastroenterol Nutr. 2011 Jul 30. [Epub ahead of print]
• Zellos A, Roy A, Schwarz KB. Use of oral naltrexone for severe pruritus due to cholestatic liver disease in children. J Pediatr Gastroenterol Nutr 2010; 51(6):787-9
• Zellos A, Boitnott JK, Schwarz KB. New-onset autoimmune hepatitis in young patients with preexisting liver disease. Dig Liver Dis 2010;42(9):657-60. Epub 2010 Mar 15.
• Roma E, Roubani A, Kolia E, Panayiotou J, Zellos A, Syriopoulou VP. Dietary compliance and life style of children with coeliac disease. J Hum Nutr Diet. 2010 Feb 12. [Epub ahead of print]
• Siahanidou T, Mikou C, Karra P, Pappas D, Zellos A, Mandyla H. Cholelithiasis in a neonate with chylous ascites. J Perinatol. 2010;30(3):227-30
• Papaevangelou V, Varsami M, Papadakis V, Zellos A, Parcharidou A, Papargyri S, Karentzou O, Manolaki N, Roma E, Polychronopoulou S. Hepatitis C treatment concomitant to chemotherapy as “salvage” therapy in children with hematologic malignancies. Pediatr Infect Dis J. 2009 Nov 25. [Epub ahead of print]
• Roma ES, Panayiotou J, Pachoula J, Constantinidou C, Polyzos A, Zellos A, Lagona E, Mantzaris GJ, Syriopoulou VP. Inflammatory bowel disease in children: the role of a positive family history. Eur J Gastroenterol Hepatol. 2009 Jun 18. [Epub ahead of print]
• Schwarz KB.,  Zellos, A,  Stamato L,  Thomas DL, Boitnott J.,  Perlman E,  Sonny C  and Casella J.F. Percutaneous liver biopsy in  hemophiliac children  with chronic  hepatitis C virus infection:  A single center experience. J Pediatr Gastroenterol Nutr 2008; 46(4):423-428.
• Jacobson K, Murray K, Zellos A and Schwarz KB. An analysis of published trials of interferon monotherapy in children with chronic hepatitis C. J Pediatr Gastroenterol Nutr 2001;34(1):52-8.
• Zellos A and Schwarz KB. Efficacy of octreotide in the treatment of children with chronic gastrointestinal bleeding. J Pediatr Gastroenterol Nutr 2000;30(4):442-6
• Zellos A, Thomas D, Sharma S, Mocilnikar K, Stamato L, Perlman E, Boitnott J and Schwarz KB. High viral load and mild liver injury in young hemophiliacs compared to other children with hepatitis C virus (HCV) infection. J Pediatr Gastroenterol Nutr 1999:29(4) 418-423.
• Zellos A. and Schwarz K.B. What’s new with hepatitis C? Contemporary Pediatrics 1998; 15 (4): 39-58
•  Submitted for publication
• Xatzipsalti M, Vourlakou C, Vakaki M, Kyriakopoulou K, Zellos A, Vazeou A . Unusual case of hepatomegaly, in a child with type 1 diabetes mellitus Submitted for publication to Clinical Pediatrics

CHAPTERS IN BOOKS

• Zellos A and Schwarz KB. Hepatitis In: Hoekelman et al.: Primary Pediatric Care Wilson M. 4th edition : Mosby 2001.:1524-1535.
• Zellos A. and Schwarz K.B. Congenital and Structural Abnormalities of the Liver In: D.A. Kelly, editor. Diseases of the Liver and the Biliary System in Children. Oxford, U.K: Blackwell Science 1999: 124-140
• Zellos A. and Saavedra M.J: Malabsorption Syndromes and Nutritional Management In: Sadler MJ, Strain JJ and Caballero B editors. Encyclopoedia of Human Nutrition. Volume 1. 1st edition. London, U.K.: Academic Press 1998: 1231-1240

ABSTRACTS

• Oliva, J. A. Dias, Fadhel Alateeqi, R. Bitas, P. Bontems, O. Borrelli, I. Broekaert, S. Cadranel, S. Cohen, M. Cosgrove, P. de Angelis, L. de Ridder, G. Domínguez-Ortega, M. D. Saccomani, R. Furlano, F. Gottrand, C. Gutiérrez-Junquera, N. Kalach, M. Kori, O. Ledder, E. Miele, V. M. Navas López, L. Norsa, C. Pienar, C. Romano, R. Shaoul, A. Sharifa, M. Tavares, N. Thapar, C. Tzivinikos, Y. Vandenplas, S. Vande Velde, C. Strisciuglio, J. Viala, A. Zellos, N. Zevit, E. Zifman and M. Thomson. Pediatric endoscopy practice in Europe: Preliminary results of a web-based survey on behalf of the endoscopy special interest group of European Society of Gastroenterology, Hepatology and Nutrition (Espghan) 6th World Congress of Pediatric Gastroenterology, Hepatology and Nutrition – ePoster Presentation (Abstract Reference A-1158-0005-01837), Gastrointestinal Endoscopy 2020, vol 91. Saturday, 6 June 2020, Kopenhagen, Denmark, Oral Presentation
• Koutsounaki, E. Papathoma, A. Koutroumba, C. Stamouli, E. Stratiki, L. Lykopoulou, S. Sebastiadou, A. Zellos. Acute liver failure in a neonate, heterozygote for ficolin-3 deficiency, due to enterovirus E11 infection. ESPGHAN Monothematic Conference in Acute Liver Failure, Athens, Greece, January 30-February 1, 2020, Oral Presentation
• Martinez-Gonzalez B., Roma-Giannikou E, Zellos A. , etPanayotou I, Sgouras D.N., Mentis A.F. The role of real time PCR in the diagnosis of Helicobacter pylori infection and the sensitivity to macrolide antibiotics in children. Oral presentation in the 39^th Panhelenic Gastroenterology Conference, Alexandroupoli, Greece, October 13, 2019. Oral presentation, 1^st Prize Award for Best Oral Abstract
• Galina V, Zellos A, Lykopoulou L, Kanavaki I, Stefanaki K, Grigoraki, Zarifi . The role of 2-Dimensional Ultrasound Shear Wave Elastography in neonatal/infantile cholestatic jaundice Oral Presentation by A. Zellos at the ESPGHAN 51^st Annual Meeting , Geneva, May 11, 2018
• Papadopoulos M, Douros K., Zellos A., Fessatou S., Priftis K. N., Panagiotou I. Eosinophilic esophagitis in children with a history of esophageal atresia. EAACI Congress 2018
• Galina P, Zellou A, Lykopoulou L, Patereli A, Zarifi M. Exploring the use of shear wave 2D elastograohy (SWE2D) in the diagnosis of liver fibrosis of various liver diseases in children. Annual Panhellenic Pediatric Society Meeting held in Ioannina, 17-19, 2016 Oral presentation, 1^st Prize Awarded for Best Oral Abstract.
• Zellos Α, Lykopoulou L, Maragkoudaki M, Margoni D, Chouliaras G, Dimakou D, Rogalidou M, Fotoulaki M, Panayotou I, Papadopoulou A, Roma E, Manolaki N. Autoimmune hepatitis in Greek children: a 14 year experience in three tertiary referral centers. 49th ESPGHAN Annual Meeting, Athens, May 25-18, 2016
• Zellos A, Lykopoulou L, Margoni D, Rogalidou M, Maragkoudaki M, Chrousos G, Roma E, Manolaki N. Biliary atresia outcome in Greek children: a 14 year experience in a tertiary referral center. 49th ESPGHAN Annual Meeting, Athens, May 25-18, 2016
• Vazeou A, Michael E, Papadopoulou S, Zellou A. Unusual case of a child with hepatomegaly, persistent hypoglycaemia, and Type 1 Diabetes (T1D). 39^th Annual Conference of the International Society for Pediatric and Adolescent Diabetes (ISPAD), October 2013, Gothenberg, Sweden, Pediatric Diabetes 2013;14:Suppl 18:53
• Karagiozoglou-Lampoudi T, Karyda S ,  Kafritsa P , Fotoulaki M , Xynias J, Roma E, Zellos A ,. Papadopoulou A , Kazantzakis A, Savvidou A , Vlahavas G and the HELSPGHAN. The Greek Project For Celiac Disease Screening: A Feasibility Study Of A Community Based Project Presented at ESPGHAN, Sorrento, Italy 2011.
• 11.  Chantzi, FM., Zellos, A., Lazopoulou, D. et al. 676 Fetal Ascites in Niemann-Pick Type C: A Rare and Grim Presentation of the Disease. Pediatr Res 68, 344–345 (2010). https://doi.org/10.1203/00006450-201011001-00676
• Zellos A, de Almeida A, C. L. Karp, J. Casella, Jones L, E. Holomon, C. Mocilnikar, Thomas DL and K.B. Schwarz. Decreased interleukin-12 secretion in children with hemophilia and hepatitis C virus infection. Hepatology 2000; 32(4) pt 2.
• Jacobson KR, Murray KF, Zellos A and Schwarz KB. Analysis of interferon monotherapy trials in children with chronic HCV. J Pediatr Gastroenterol Nutr 2000; 31(2): A476. Oral presentation, World Congress of Pediatric Gastroenterology, Hepatology and Nutrition, Boston, MA August 2000.
• Zellos A, de Almeida A, C. L. Karp, Jones L, Thomas DL and K.B. Schwarz. Decreased interleukin-2 and interleukin -4 in children with hemophilia and hepatitis C virus infection. Hepatology 1999; 30 (4): 454A. Poster presentation, AASLD Meeting, Dallas, TX, November 1999. American Liver Foundation Pediatric Research Award.
• Zellos A, Mocilnikar C and Schwarz KB. Autoimmune hepatitis in patients with preexisting liver disease. J Pediatr Gastroenterol Nutr 1999; 29(4): A88. Poster presentation, NASPGN Meeting, Denver, CO October 1999
• Zellos A, Thomas DL, Nolt K, Boitnott J, Perlman E, Casella J and K.B. Schwarz.  High viral load and mild liver injury in young hemophiliacs compared to other children with hepatitis C virus (HCV) infection. Hepatology 1998; 28(4): A796.  Poster presentation at the AASLD Meeting, Chicago, October 1998
• Zellos A, Thomas DL, Boitnott J, Perlman E, Casella J and K.B. Schwarz. Correlation between viral load and presumed duration of hepatitis C virus (HCV) infection in childhood. Hepatology 1998; 28(4): A2081
• Zellos A, Thomas DL, and K.B. Schwarz. Serum procollagen III peptide is elevated in adolescents with chronic hepatitis C compared to healthy controls.  J Pediatr Gastroenterol Nutr 1998; 27 (4): A106.  Poster presentation at the NASPGN Meeting, October 1998, Orlando, Florida.
• Zellos A and K.B. Schwarz. Successful use of naltrexone for refractory pruritus in children with cholestatic liver disease. J Pediatr Gastroenterol Nutr 1998; 27 (4): A26.  Oral presentation at the NASPGN Meeting, October 1998, Orlando, Florida.
• Zellos A and K.B. Schwarz. Successful use of octreotide for long-term treatment of children with severe gastrointestinal bleeding. J Pediatr Gastroenterol Nutr 1998; 27 (4): A93.  Poster presentation at the NASPGN October 1998, Orlando, Florida.
• Zellos A, Thomas DL, Perlman E, Boitnott J and Schwarz K. B. Liver pathology in a cohort of hepatitis C virus (HCV) infected children. J Pediatr Gastroenterol  Nutr 1998; 26 (5): A202. Poster presentation in the ESPGHAN-NASPGN 5th Joint Meeting: Toulouse, France, May 1998
• Zellos A, Thomas DL, Sharma S, Mocilnikar C, Stamato L, Perlman E, Boitnott J, Casella J and Schwarz K.B. Respose to interferon alpha-2b therapy in children with hepatitis C virus (HCV) infection. Acta Gastro-Enterologica Belgica 1998; 61(2): A253.  Oral presentation in Viral Hepatitis throughout Infancy to Adulthood Meeting:  Brussels, Belgium, May 1998
• Di Palma J, Zellos A., Rusnock E, Keuhl K. Endoscopic, Histologic and Electron Microscopic (EM) Findings in Protein-Losing Enteropathy (PLE) Post Fontan Procedure. Gastrointestinal Endoscopy. 1995; 41(4): A156