1 Gastroenterology and Hepatology Unit, Department of Internal Medicine, Raja Isteri Pengiran Anak Saleha Hospital, Bandar Seri Begawan, Brunei Darussalam.
2 Department of Pathology, Raja Isteri Pengiran Anak Saleha Hospital, Bandar Seri Begawan, Brunei Darussalam.
3 Department of Radiology, Raja Isteri Pengiran Anak Saleha Hospital, Bandar Seri Begawan, Brunei Darussalam.
4 Division of Infectious Disease, Department of Medicine, Raja Isteri Pengiran Anak Saleha Hospital, Bandar Seri Begawan, Brunei Darussalam.
5 Department of Medicine, PMMPHAMB Hospital, Tutong, Brunei Darussalam.