O.P. Nyssen¹, D.S. Bordin², B. Tepes³, A. Pérez-Aisa⁴, D. Vaira⁵, M. Caldas¹, L. Bujanda⁶, M. Castro-Fernández⁷, F. Lerang⁸, M. Leja⁹, L. Rodrigo¹⁰, T. Rokkas¹¹, L. Kupcinskas¹², J. Pérez-Lasala¹³, L.V. Jonaitis¹², O. Shvets¹⁴, A. Gasbarrini¹⁵, H. Simsek¹⁶, A.T.R. Axon¹⁷, G.M. Buzas¹⁸, J.C. Machado¹⁹, Y. Niv²⁰, L. Boyanova²¹, A. Goldis²², V. Lamy²³, A. Tonkic²⁴, K. Przytulski²⁵, C. Beglinger²⁶, M. Venerito²⁷, P. Bytzer²⁸, L.G. Capelle²⁹, T. Milosavljevic³⁰, L.I. Veijola³¹, J. Molina-Infante³², L. Vologhzanina³³, G. Fadeenko³⁴, I. Ariño³⁵, G. Fiorini⁵, M.G. Donday¹, F. Megraud³⁶, C. O'Morain³⁷ y J.P. Gisbert¹, en representación de los Investigadores Hp-EuReg

¹Servicio de Aparato Digestivo. Hospital Universitario de La Princesa, IIS-IP, Universidad Autónoma de Madrid y CIBEREHD, Madrid. ²Department of pancreatobiliary and upper GI diseases, Moscow Clinical Scientific Center, Moscow (Federación Rusa). ³Gastroenterology Unit, AM DC Rogaska, Rogaska Slatina (Eslovenia). ⁴Agencia Sanitaria Costa del Sol, Marbella. ⁵Gastroenterology Unit, S. Orsola Malpighi Hospital, Bologna (Italia). ⁶Department of Gastroenterology, Hospital Donostia/Instituto Biodonostia, CIBEREHD, Universidad del País Vasco (UPV/EHU), Donosti. ⁷Digestive Unit, Hospital de Valme, Sevilla. ⁸Medical Department, Central Hospital Ostfold, Fredrikstad (Noruega). ⁹Institute of Clinical and Preventive Medicine & Faculty of Medicine, University of Latvia, Riga (Letonia). ¹⁰Gastroenterology Unit, Hospital Universitario Central de Asturias, Oviedo. ¹¹Gastroenterology Unit, Henry Dunant Hospital, Athens (Grecia). ¹²Department of Gastroenterology, Lithuanian University of Health Sciences, Kaunas (Lituania). ¹³Digestive Service, HM Sanchinarro, Madrid. ¹⁴Internal Diseases Department No.1, National Medical University named after O.O. Bogomolets, Kyiv (Ucrania). ¹⁵Gastronterology Area, Fondazione Policlinico Universitario A. Gemelli, Rome (Italia). ¹⁶Internal Medicine/Gastroenterology department, Hacettepe University Faculty of Medicine, Ankara (Turquía). ¹⁷Gastroenterology Unit, University of Leeds, Leeds (Reino Unido). ¹⁸Gastroenterology Unit, Ferencváros Policlinic, Budapest (Hungría). ¹⁹Instituto de Investigação e Inovação em Saúde, Universidade do Porto, and Ipatimup-Institute of Molecular Pathology and Immunology of the University of Porto, Porto (Portugal). ²⁰Department of Gastroenterology, Rabin Medical Center, Tel Aviv University, Tel Aviv (Israel). ²¹Department of Medical Microbiology, Medical University of Sofia, Sofia (Bulgaria). ²²Gastroenterology Unit, Timisoara Hospital, Timisoara (Rumanía). ²³Department of Gastroenterology, Hepatology & Nutrition, CHU Charleroi, Charleroi (Bélgica). ²⁴University Hospital Centre Split (Croacia). ²⁵Gastroenterology Unit, Medical Centre for Postgraduate Education, Warsaw (Polonia). ²⁶Gastroenterology Unit, Hospital de Basel, Basel (Suiza). ²⁷Department of Gastroenterology, Hepatology and Infectious Diseases, Otto-von-Guericke University Hospital, Magdeburg (Alemania). ²⁸Department of Medicine, Zealand University Hospital, Copenhagen University, Copenhagen (Dinamarca). ²⁹Gastroenterology and Hepatology, Erasmus MC University, Rotterdam (Países Bajos). ³⁰Medical Department, Clinical Center of Serbia Clinic for Gastroenterology and hepatology, University of Belgrade, Belgrade (Serbia). ³¹Internal Medicine, Herttoniemi Hospital, Helsinki (Finlandia). ³²Gastroenterology Unit, Hospital San Pedro de Alcántara. ³³Gastroenterology Unit Gastrocentr, Perm, Perm (Federación Rusa). ³⁴Digestive Ukrainian Academy of Medical Sciences, Kyiv (Ucrania). ³⁵Gastroenterology Unit, Hospital Clínico Universitario Lozano Blesa, Zaragoza. ³⁶Laboratoire de Bactériologie, Hôpital Pellegrin, Bordeaux Cedex (Francia). ³⁷Trinity College Dublin-Faculty of Health Sciences, Trinity College Dublin; Dublin/IE, Faculty of Health Sciences, Dublin (Irlanda).