[1] Portuguese Oncol Inst Porto, Dept Gastroenterol, P-4200072 Oporto, Portugal
[2] Portuguese Oncol Inst Coimbra, Dept Gastroenterol, Coimbra, Portugal
[3] Erasmus MC, Dept Gastroenterol & Hepatol, Rotterdam, Netherlands
[4] Ctr Hosp Porto, Dept Gastroenterol, Oporto, Portugal
[5] Ctr Res Hlth Technol & Informat Syst CINTESIS, Fac Med, Oporto, Portugal
[6] Univ Porto ICBAS UP, Inst Biomed Sci, Oporto, Portugal
[7] Adelaide & Meath Hospital Trinity Coll, AMNCH TCD, Dept Gastroenterol, Dublin, Ireland
[8] Portuguese Oncol Inst Porto, Mol Oncol Res Grp, P-4200072 Oporto, Portugal
[9] Ankara Univ, Dept Pathol, Sch Med, TR-06100 Ankara, Turkey
[10] HUG Hop Cantonal, Dept Gastroenterol & Hepatopancreatol, Geneva, Switzerland
[11] Univ Porto IPATIMUP, Inst Mol Pathol & Immunol, Oporto, Portugal
[12] Ctr Hosp S Joao, Fac Med, Dept Gastroenterol, Oporto, Portugal
[13] Univ Magdeburg, Klin Gasroenterol Hepatol & Infektol, D-39106 Magdeburg, Germany
[14] CHU Nantes, Serv Hepatogastroenterol, Hotel Dieu, F-44035 Nantes 01, France
[15] INSERM, U853, Bordeaux, France
[16] Univ Bordeaux, Bacteriol Lab, Bordeaux, France
[17] Japan Res Fdn Predict Diag & Therapy Gastr Canc J, Tokyo, Japan
[18] Vanderbilt Univ, Sch Med, Div Gastroenterol, Nashville, TN 37212 USA
[19] Hop Edouard Herriot, Dept Digest Dis, Lyon, France
[20] Univ Helsinki, Cent Hosp, Dept Pathol, HUSLAB, Helsinki, Finland
[21] Univ Helsinki, Cent Hosp, Haartman Inst, Helsinki, Finland
[22] Univ Helsinki, Res Program Unit, Helsinki, Finland
[23] Gen Infirm, Ctr Digest Dis, Leeds LS1 3EX, W Yorkshire, England
[24] Ctr Hosp S Joao, Dept Pathol, Fac Med, Oporto, Portugal