M. Thörn¹, A. Rönnblom¹, B.-M. Eriksson¹, F. Rorsman¹, P. Sangfelt¹, A. Wanders², K. Bondeson³, ¹Uppsala University, Dept of Medical Sciences, Uppsala, Sweden, ²Uppsala University, Dept of Immunology, Genetics and Pathology, Uppsala, Sweden, ³Uppsala University, Dept of Medical Biochemistry and Microbiology, Uppsala, Sweden

E. Szymanska*¹, M. Dadalski², S. Szymanska³, W. Grajkowska³, M. Pronicki³, J. Kierkus²

¹Children’s Memorial Health Institute, Department of Pediatrics, Nutrition and Metabolic Disorders,, Warsaw, Poland, ²Children’s Memorial Health Institute, Department of Gastroenterology, Hepatology and Feeding Disorders, Warsaw, Poland, ³Children’s Memorial Heath Institute, Department of Pathology, Warsaw, Poland

A. Shitrit¹, S. Granovsky-Grisaru², T. Adar¹, B. Koslowsky¹, B. Mazuz¹, M. Shenwald¹, E. Goldin¹, ¹Shaare Zedek Medical Center, Digestive diseases institute, Jerusalem, Israel, ²Shaare Zedek Medical Center, Department of obstetrics and gynecology, division of maternal fetal medicine, Jerusalem, Israel

L. Alessandroni¹, C. Papi², L.G. Papparella³, M.C. Addarii¹, A. Kohn¹, ¹San Camillo-Forlanini Hospital, Rome, Italy, ²San Filippo-Neri Hospital, Rome, Italy, ³Campus Bio-Medico, Rome, Italy

M. Ward*^{1, 2}, B. Warner², N. Unsworth³, J. Sanderson², Z. Arkir³, P. Irving²

¹Alfred Hospital, Gastroenterology, Melbourne, Australia, ²Guy’s and St. Thomas Hospital, Gastroenterology, London, United Kingdom, ³Guy’s and St. Thomas Hospital, Reference Chemistry, Viapath, London, United Kingdom

L. Patience¹, A. Watson², ¹Centre of Health Science, Research and Development, Inverness, United Kingdom, ²Raigmore Hospital/Centre of Healt Science, Colorectal Surgery/Research and Development, Inverness, United Kingdom

C. Petruzziello¹, A. Armuzzi², A. Kohn³, R. D'Incà⁴, C. Papi⁵, L. Spina⁶, L. Guidi², M.L. Scribano³, S. Onali¹, G. Condino¹, E. Calabrese¹, R. Monterubbianesi³, P. Alvisi⁷, W. Fries⁸, G. Riegler⁹, F. Castiglione¹⁰, G. Margagnoni⁵, G. Meucci¹¹, F. Rogai¹², F. Pallone¹, L. Biancone¹, ¹Università Tor Vergata, Roma, Italy, ²Med Int/GI CIC Università Cattolica, Roma, Italy, ³AO S. Camillo Forlanini, Roma, Italy, ⁴Università Padova, Padova, Italy, ⁵UOC GE/Hep, AO S. Filippo Neri, Roma, Italy, ⁶Università S. Donato, Milano, Milano, Italy, ⁷Ospedale Maggiore, Bologna, Bologna, Italy, ⁸Università Messina, Messina, Italy, ⁹SUN Seconda Università di Napoli, Napoli, Italy, ¹⁰Università Federico II, Napoli, Napoli, Italy, ¹¹Ospedale S. Giuseppe, Milano, Milano, Italy, ¹²AOU Careggi, Firenze, Firenze, Italy

A. Banaszkiewicz*¹, B. Targonska², K. Kowalska-Duplaga³, K. Karolewska-Bochenek¹, A. Sieczkowska⁴, A. Gawronska¹, U. Grzybowska-Chlebowczyk⁵, E. Krzesiek⁶, I. Lazowska-Przeorek¹, M. Kotowska¹, E. Sienkiewicz¹, J. Walkowiak², H. Gregorek⁷, A. Radzikowski¹, P. Albrecht¹

¹Medical University of Warsaw, Dept. of Pediatric Gastroenterology and Nutrition, Warsaw, Poland, ²Poznan University of Medical Sciences, Dept. of Pediatric Gastroenterology and Metabolic Diseases, Poznan, Poland, ³Jagiellonian University Medical College, Department of Pediatrics, Gastroenterology and Nutrition, Krakow, Poland, ⁴Medical University of Gdansk, Department of Pediatric Gastroenterology, Hepatology and Nutrition, Gdansk, Poland, ⁵Medical University of Silesia, Department of Pediatrics, Gastroenterology Unit, Katowice, Poland, ⁶Wroclaw Medical University, Department of Pediatrics, Gastroenterology and Nutrition, Wroclaw, Poland, ⁷The Children's Memorial Health Institute, Department of Microbiology and Clinical Immunology, Warsaw, Poland

N. Pedersen^1,2, J. Burisch³, L. Martinsen⁴, M. Bennedsen⁵, P. Thielsen⁶, S. Bell⁷, Z. Vegh³, A. Haaber⁸, D. Duricova⁹, T. Jess¹⁰, E. Langholz¹¹, P. Munkholm³, ¹Herlev University Hospital, Department of Gastroenterology, Copenhagen, Denmark, ²University, Gastroenterology, Copenhagen, Denmark, ³University of Copenhagen, Gastroenterology, Herlev, Denmark, ⁴Nykøbing Falster Hospital, Gastroenterology, Nykøbing Falster, Denmark, ⁵Frederikssund Hospital, Gastroenterology, Frederikssund, Denmark, ⁶Herlev University Hospital, Gastroenterology, Herlev, Denmark, ⁷University of Melbourne, Gastroenterology, Melbourne, Australia, ⁸Gentofte Hospital, Gastroenterology, Gentofte, Denmark, ⁹Charls University Hospital, IBD research centre ISCARE a.s., Herlev, Denmark, ¹⁰State Serum Institute, Epidemiology, Copenhagen, Denmark, ¹¹Gentofte, Gastroenterology, Gentofte, Denmark

I.A. Pintilie, O. Nedelciuc, A.M. Blaj, C. Mihai, C. Cijevschi Prelipcean, .University of Medicine and Pharmacy Gr. T. Popa, Center of Gastroenterology and Hepatology “St. Spiridon” Hospital, Iasi, Romania

Y. Gonzalez Lama*, C. Suarez Ferrer, G.P. Irene, M. Calvo Moya, V. Matallana Royo, M.I. Vera Mendoza, L. Abreu Garcia

Hospital Puerta De Hierro, Gastroenterology, Madrid, Spain

D. van den Nieuwendijk¹, C.I. Baeten², J.C. Hardwick¹, R.A. Veenendaal¹, A.R. Vahrmeijer², B.A. Bonsing², A.E. van der Meulen-de Jong¹, ¹Leiden University Medical Center, Gastroenterology and Hepatology, Leiden, Netherlands, ²Leiden University Medical Center, Surgery, Leiden, Netherlands