[1] Med Univ Silesia, Div Endocrinol, Dept Pathophysiol & Endocrinol, PL-40952 Katowice, Poland
[2] St James Hosp, Dept Clin Med & Gastroenterol, Dublin, Ireland
[3] Trinity Coll Dublin, Dublin, Ireland
[4] Univ Verona, I-37100 Verona, Italy
[5] Hadassah Univ Hosp, Dept Endocrinol & Metab, IL-91120 Jerusalem, Israel
[6] Univ Kiel, Inst Allgemeine Pathol & Pathol Anat, Kiel, Germany
[7] Univ Uppsala Hosp, Dept Radiol, Uppsala, Sweden
[8] N Hampshire Hosp, Dept Gastroenterol, Basingstoke, Hants, England
[9] Univ Uppsala Hosp, Dept Internal Med, Endocrine Unit, S-75185 Uppsala, Sweden
[10] Charite, Dept Internal Med, Div Gastroenterol & Hepatol, Campus Virchow Klinikum, D-13353 Berlin, Germany
[11] Kantonsspital, Inst Pathol, Baden, Switzerland
[12] Univ Hosp Gasthuisberg, Dept Gastroenterol, Digest Oncol Unit, B-3000 Leuven, Belgium
[13] Tata Mem Hosp, Dept Digest Dis, Bombay, Maharashtra, India
[14] Univ Turin, St Luigi Hosp, Dept Biol & Clin Sci, Turin, Italy
[15] Royal Free Hosp, Dept Med, London NW3 2QG, England