An Jian Leung, MBBS, MRCP (Int Med), MMed (S’pore)
Department of Medicine, National University Hospital, Singapore; Correspondence to: An Jian Leung, MBBS, MRCP (Int Med), MMed (S’pore), Department of Medicine, National University Hospital, 5 Lower Kent Ridge Rd, 119074, Singapore.
Soon Boon Justin Wong, MBBS
Department of Pathology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore