1. School of Medicine, University of Zagreb; Andrija Stampar School of Public Health; Rockefellerova 4 Zagreb Croatia 10000
2. University Hospital of Wales; Welsh Institute of Dermatology; Heath Park Cardiff UK CF14 4XW
3. Lee Kong Chian School of Medicine, Nanyang Technological University; Centre for Population Health Sciences; 3 Fusionopolis Link, #06-13 Nexus@one-north Singapore Singapore 138543
4. Imperial College London; Department of Primary Care and Public Health; St Dunstan's Road London UK W6 8RP
5. Stetson University; Public Health Program; 421 N Woodland Blvd DeLand Florida USA 32723
6. Harrogate and District NHS Foundation Trust; Department of Dermatology; Harrogate UK
7. University of Ljubljana; Department of Family Medicine, Faculty of Medicine; Ljubljana Slovenia
8. Imperial College London; Global eHealth Unit, Department of Primary Care and Public Health, School of Public Health; Reynolds Building St Dunstans Road London UK W6 8RP