1. Department of Dermatology University Hospital Duisburg‐Essen Essen Germany
2. Department of Dermatology Erasmus MC University Rotterdam The Netherlands
3. PHARMO Institute for Drug Outcome Research Utrecht The Netherlands
4. CoRPS ‐ Center of Research on Psychology in Somatic Diseases Tilburg University The Netherlands
5. Comprehensive Cancer Centre South (CCCS) Eindhoven Cancer Registry Eindhoven The Netherlands
6. Department of Public Health Erasmus MC University Rotterdam The Netherlands