[1] Univ Indonesia, Fac Med, Dr Cipto Mangunkusumo Hosp, Div Gastroenterol,Dept Internal Med, Jakarta, Indonesia
[2] Gajah Mada Univ, Fac Med, Dr Sardjito Hosp, Div Gastroenterohepatol,Dept Internal Med, Yogyakarta, Indonesia
[3] Airlangga Univ, Fac Med, Dr Sutomo Hosp, Div Gastroenterol,Dept Internal Med, Surabaya, Indonesia
[4] Padjajaran Univ, Fac Med, Dr Hasan Sadikin Hosp, Div Gastroenterohepatol,Dept Internal Med, Bandung, Indonesia
[5] Sumatera Utara Univ, Fac Med, H Adam Malik Hosp, Div Gastroenterohepatol,Dept Internal Med, Medan, Indonesia
[6] Udayana Univ, Sanglah Hosp, Dept Internal Med, Fac Med, Denpasar, Indonesia