1. Department of Dermatology Leiden University Medical Center Leiden The Netherlands
2. Department of Dermatology Dermateam at Bravis Hospital Bergen op Zoom The Netherlands
3. Department of Dermatology Centrum Oosterwal Alkmaar The Netherlands
4. Department of Rheumatology Leiden University Medical Center Leiden The Netherlands
5. Department of Dermatology Erasmus MC, University Medical Center Rotterdam The Netherlands