1. Centre for Population Health Sciences (CePHaS) Lee Kong Chian School of Medicine Nanyang Technological University Clinical Sciences Building, 11 Mandalay Road Singapore 308232 Singapore
2. Section of Acute Medicine Department of Internal Medicine Amsterdam UMC location VUmc the Netherlands
3. Dermatology Service KK Women's and Children's Hospital Singapore
4. National Skin Centre 1 Mandalay Road 308205 Singapore
5. Global Digital Health Unit, Department of Primary Care and Public Health, School of Public Health Imperial College London 3rd floor Reynolds Building, St Dunstan's Road London W6 8RP U.K.