[1] Hadassah Univ Hosp, Hadassah Med Org, Jerusalem, Israel
[2] Ege Univ, Fac Med, Div Gastroenterol, Izmir, Turkey
[3] Laikon Gen Hosp, Dept Pathophysiol, Athens, Greece
[4] George Papanikolaou Gen Hosp Thessaloniki, Dept Gastroenterol, Thessaloniki, Greece
[5] Univ Hong Kong, Dept Med, Hong Kong, Hong Kong, Peoples R China
[6] Univ Fed Rio Grande Sul, Porto Alegre, RS, Brazil
[7] Natl Cheng Kung Univ Hosp, Dept Internal Med, Tainan 70428, Taiwan
[8] Bristol Myers Squibb Co, Wallingford, CT 06492 USA