[1] Univ Malaya, Med Dept, Gastroenterol Unit, Med Ctr, Kuala Lumpur, Malaysia
[2] Univ Malaya, Fac Arts & Social Sci, Dept Lib & Informat Sci, Kuala Lumpur, Malaysia
[3] Hosp Selayang, Hepatol Dept, Batu Caves, Malaysia
[4] Univ Malaya, Fac Med, Dept Med, Kuala Lumpur, Malaysia