1. Department of Dermatology, University Hospital Zurich , Zurich , Switzerland
2. Faculty of Medicine, University of Zurich , Zurich , Switzerland
3. Department of Dermatology, University Hospital Basel , Basel , Switzerland
4. Department of Dermatology, University of Chile , Santiago , Chile
5. Clínica Dermacross , Santiago , Chile
6. Department of Dermatology, Facultad de Medicina, Pontificia Universidad Católica de Chile , Santiago , Chile
7. Faculdade de Medicina do ABC , Proderma , Brazil
8. Faculdade de Medicina, Universidade do Vale do Rio dos Sinos/Hospital Moinhos de Vento , Porto Alegre , Brazil
9. Graf Biostatistics , Zurich , Switzerland
10. Department of Dermatology, Bispebjerg Hospital, University of Copenhagen , Copenhagen , Denmark
11. Department of Dermatology, University of Miami, Miller School of Medicine , Miami, FL , USA
12. Department of Dermatology, University of São Paulo, School of Medicine , São Paulo , Brazil
13. Centre for Dermatology Research, NIHR Manchester Biomedical Research Centre, University of Manchester , Manchester , UK