Department of Dermatology, Singapore General Hospital, Singapore
Michelle Mei Fung Chan, MBBS, FRCPath
Department of Anatomical Pathology, Singapore General Hospital, Singapore
Choon Chiat Oh, MBBS, MSc, FRCP
Department of Dermatology, Singapore General Hospital, Singapore; Correspondence to: Choon Chiat Oh, MBBS, MSc, FRCP, Department of Dermatology, Singapore General Hospital, Outram Road, Singapore 169608.