Correspondence to: Yee Leng Teoh, MBBS, MRCP (UK), Department of Dermatology, Changi General Hospital, Singapore 529889.; Department of Dermatology, Changi General Hospital, Singapore
Suruchi Vohra, MBBS
Department of Dermatology, Changi General Hospital, Singapore
Yong-Kwang Tay, MBBS, FRCP (London)
Department of Dermatology, Changi General Hospital, Singapore