[1] Univ Indonesia, Dept Internal Med, Fac Med, Bogor, Indonesia
[2] Univ Indonesia, Dept Internal Med, Div Gastroenterol, Bogor, Indonesia
[3] Univ Indonesia, Cipto Mangunkusumo Hosp, Fac Med, Dept Internal Med, Bogor, Indonesia
[4] Univ Indonesia, Cipto Mangunkusumo Hosp, Fac Med, Dept Internal Med,Div Gastroenterol, Bogor, Indonesia