[1] Medistra Hosp, Digest Dis & Gastrointestinal Oncol Ctr, Jl Jend Gatot Subroto Kav 59, Jakarta 12950, Indonesia
[2] Univ Indonesia, Dr Cipto Mangunkusumo Natl Gen Hosp, Fac Med, Hepatobil Div,Dept Internal Med, Jakarta, Indonesia
[3] Natl Univ Singapore Hosp, Div Gastroenterol, Dept Med, Singapore, Singapore
[4] SL Raheja Hosp Fortis Assoc Mahim, Dept Gastroenterol & Endoscopy, Mumbai, Maharashtra, India
[5] Somaiya Ayurvihar, Asian Canc Inst, Dept Gastroenterol & Endoscopy, Mumbai, Maharashtra, India