1. Department of Gastroenterology, Portuguese Oncology Institute of Porto, Portugal
2. Centre for Research in Health Technologies and Information Systems (CINTESIS), Medical Faculty, Porto, Portugal
3. Department of Gastroenterology, Portuguese Oncology Institute of Coimbra, Portugal
4. Department of Gastroenterology and Hepatology, Erasmus MC, Rotterdam, The Netherlands
5. Department of Gastroenterology, Centro Hospitalar do Porto, Portugal
6. Institute of Biomedical Sciences, University of Porto (ICBAS/UP), Porto, Portugal
7. AMNCH/TCD, Adelaide and Meath Hospital/Trinity College, Gastroenterology Department, Dublin, Ireland
8. Molecular Oncology Research Group, Portuguese Oncology Institute of Porto, Portugal
9. Department of Pathology, Ankara University Medical School, Ankara, Turkey
10. Département de Gastroénterologie et d’Hépatopancréatologie, H.U.G. Hôpital Cantonal, Geneve, Switzerland
11. Institute of Molecular Pathology and Immunology of the University of Porto (IPATIMUP), Porto, Portugal
12. Department of Gastroenterology, Centro Hospitalar S. João/Medical Faculty, Porto, Portugal
13. Klinik der Gasroenterologie, Hepatologie und Infektologie, Otto von Guericke Universität Magdeburg, Magdeburg, Germany
14. Service d’Hépato-Gastroentérologie, Hôtel Dieu, CHU de Nantes, Nantes, France
15. Inserm U853 & Université Bordeaux, Laboratoire de Bacteriologie, Bordeaux, France
16. Japan Research Foundation of Prediction, Diagnosis and Therapy for Gastric Cancer (JRF PDT GC), Tokyo, Japan
17. Division of Gastroenterology, Vanderbilt University School of Medicine, Nashville, USA
18. Hôpital Edouard Herriot, Department of Digestive Diseases, Lyon, France
19. Department of Pathology, HUSLAB and Haartman Institute, Helsinki University Central Hospital and University of Helsinki, Helsinki, Finland.
20. Genome-Scale Biology, Research Program Unit, University of Helsinki, Helsinki, Finland
21. Centre for Digestive Diseases, The General Infirmary at Leeds, Leeds, United Kingdom
22. Department of Pathology, Medical Faculty/Centro Hospitalar S. João, Porto, Portugal