Affiliation: | 1. Division of Dermatology, Department of Medicine, National University Hospital, Singapore, Singapore;2. Biostatistics Unit, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore;3. Division of Dermatology, Department of Medicine, National University Hospital, Singapore, Singapore Department of Medicine, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore |