Nababan, S.H.H., Hepatobiliary Division, Internal Medicine Department, Cipto Mangunkusumo National General Hospital, Faculty of Medicine, Universitas Indonesia, Jl. Diponegoro No. 71, Jakarta, 10430, Indonesia; Mansjoer, A., Clinical Epidemiology Unit, Internal Medicine Department, Cipto Mangunkusumo National General Hospital, Faculty of Medicine, Universitas Indonesia, Jl. Diponegoro No.71, Jakarta, 10430, Indonesia; Fauzi, A., Gastroenterology Division, Internal Medicine Department, Cipto Mangunkusumo National General Hospital, Faculty of Medicine, Universitas Indonesia, Jl. Diponegoro No.71, Jakarta, 10430, Indonesia; Gani, R.A., Hepatobiliary Division, Internal Medicine Department, Cipto Mangunkusumo National General Hospital, Faculty of Medicine, Universitas Indonesia, Jl. Diponegoro No. 71, Jakarta, 10430, Indonesia