1. Department of Paediatrics; Chinese University of Hong Kong; Prince of Wales Hospital; Shatin Hong Kong SAR China
2. Pilot Laboratory; Faculty of Health Sciences; University of Macau, Avenida da Universidade; Taipa Macau China
3. Hong Kong Dermatology Foundation Ltd; Hong Kong SAR; China
4. Department of Paediatrics and Adolescent Medicine; Pamela Youde Nethersole Eastern Hospital; Hong Kong SAR China