1. Dutch Skin Foundation; Utrecht the Netherlands
2. Department of Dermatology; Academic Medical Center; University of Amsterdam; Amsterdam the Netherlands
3. Department of Clinical Epidemiology, Biostatistics and Bioinformatics; Academic Medical Center; University of Amsterdam; Amsterdam the Netherlands
4. VU University Medical Center; Department of Dermatology; Amsterdam the Netherlands
5. VU University Medical Center; Department of Epidemiology and Biostatistics; EMGO Institute for Health and Care Research; Amsterdam the Netherlands