[1] REYKJAVIK CITY HOSP, DEPT MED, REYKJAVIK, ICELAND
[2] UNIV HOSP, REYKJAVIK, ICELAND
[3] AUST AGDER CENT HOSP, ARENDAL, NORWAY
[4] ULLEVAL UNIV, RIKSHOSP UNIV, DEPT MED A, OSLO, NORWAY
[5] TELEMARK CENT HOSP, PORSGRUNN, NORWAY
[6] DIAKONHJEMMET HOSP OSLO, OSLO, NORWAY
[7] LOVISENBERG HOSP, OSLO, NORWAY
[8] MEATH HOSP, DEPT GASTROENTEROL, DUBLIN 8, IRELAND
[9] ADELAIDE HOSP, DUBLIN 8, IRELAND
[10] GENTOFTE UNIV HOSP, DK-2900 COPENHAGEN, DENMARK
[11] GLOSTRUP CTY HOSP, COPENHAGEN, DENMARK
[12] HERLEV HOSP, DEPT MED C, COPENHAGEN, DENMARK
[13] HERLEV HOSP, DEPT MED F, COPENHAGEN, DENMARK
[14] LEICESTER GEN HOSP, DEPT GASTROENTEROL, LEICESTER LE5 4PW, LEICS, ENGLAND
[15] ACAD ZIEKENHUIS, DEPT GASTROENTEROL, MAASTRICHT, NETHERLANDS
[16] UNIV ESSEN GESAMTHSCH KLINIKUM, DEPT GASTROENTEROL, D-4300 ESSEN, GERMANY
[17] CHU AMIENS, DEPT HEPATOGASTROENTEROL, AMIENS, FRANCE
[18] UNIV MILAN, DEPT GASTROENTEROL, MILAN, ITALY
[19] ARCISPEDALE S MARIA NUOVA, DEPT INTERNAL MED 3, REGGIO EMILIA, ITALY
[20] POLICLIN CAREGGI, DIV GASTROENTEROL, FLORENCE, ITALY
[21] HOSP XERAL CIES, POVISA POLICLIN VIGO, DEPT DIGEST DIS, VIGO, SPAIN
[22] HOSP MEIXOEIRO, DEPT DIGEST DIS, VIGO, SPAIN
[23] CONSORCI HOSP PARC TAULI, DEPT ENDOSCOPY, SABADELL, SPAIN
[24] CONSORCI HOSP PARC TAULI, DEPT EPIDEMIOL, SABADELL, SPAIN
[25] HOSP SAN MARCOS, BRAGA, PORTUGAL
[26] HOSP SAO JOAO, DEPT GASTROENTEROL, OPORTO, PORTUGAL
[27] UNIV IOANNINA, DEPT INTERNAL MED, IOANNINA, GREECE
[28] HOSP UNIV SANTA MARIA, DEPT MED 2, LISBON, PORTUGAL
[29] ALMADA REG HLTH DEPT, DEPT GASTROENTEROL & PATHOL, LISBON, PORTUGAL
[30] OSPED V CERVELLO, DEPT MED, PALERMO, ITALY
[31] UNIV GEN HOSP HERAKLION, DEPT GASTROENTEROL, IRAKLION, GREECE
[32] SOROKA UNIV HOSP, GASTROENTEROL UNIT, BEER SHEVA, ISRAEL
[33] UNIV ROTTERDAM HOSP, ROTTERDAM DIJKZIGT, DEPT INTERNAL MED 2, DIV GASTROENTEROL, ROTTERDAM, NETHERLANDS
[34] MED COMP CONSULTANTS, ROTTERDAM, NETHERLANDS