1. Department of Dermatology Erasmus University Medical Centre Rotterdam the Netherlands
2. Department of Research Netherlands Comprehensive Cancer Organization (IKNL) Utrecht the Netherlands
3. Department of Public Health Erasmus University Medical Centre Rotterdam the Netherlands
4. National Health Care Institute Diemen the Netherlands
5. Department of General Practice Erasmus University Medical Centre Rotterdam the Netherlands
6. Department of Medical Informatics Erasmus University Medical Centre Rotterdam the Netherlands
7. Department of Dermatology Beth Israel Deaconess Medical Centre Harvard Medical School Boston MA U.S.A.