1. JC School of Public Health and Primary Care, The Chinese University of Hong Kong and Prince of Wales Hospital, Shatin, Hong Kong
2. Consultant Dermatologist and Honorary Professor, Department of Dermatology, Godavari Foundation Medical College and Research Center, DUPMCJ, India
3. Consultant and Assistant Professor of Dermatology, Department of Dermatology, Mayo Clinic College of Medicine, Rochester, Minnesota, USA