1. Department of Dermatology Clinique Notre‐Dame de Grâce Gosselies Belgium
2. Université Libre de Bruxelles Gosselies Belgium
3. Institute of Statistics, Biostatistics, and Actuarial Sciences Université Catholique de Louvain Louvain‐la‐Neuve Belgium
4. Clinical Epidemiology Unit IDI‐IRCCS Rome Italy
5. Department of Dermatology Justus Liebig University Giessen Germany
6. Department of Psychology University of Zaragoza Zaragoza Spain
7. Department of Public Health Hedmark University College Elverum Norway
8. Department of Dermatology Zealand University Hospital Roskilde Denmark
9. University of Copenhagen Copenhagen Denmark
10. Department of Dermatology University Hospital of Brest Brest France
11. Department of Dermatology and Allergology University of Szeged Szeged Hungary
12. Section of Biostatistics University of Oslo Oslo Norway
13. Institute of Psychology Health University of Leiden Leiden The Netherlands
14. Department of Dermatology Institute of Clinical Medicine Oslo University Hospital University of Oslo Oslo Norway
15. Department of Dermatology Stavanger University Hospital Stavanger Norway
16. Department of Dermatology Wroclaw Medical University Wroclaw Poland
17. Department of Psychiatry and Psychosomatics Mental Health Research Center I. M. Sechenov First Moscow State Medical University Moscow Russia
18. Department of Dermatology University Hospital Miguel Servet. IIS Aragon Zaragoza Spain
19. Department of Dermatology Sisli Etfal Teaching and Research Hospital University of Health Sciences Istanbul Turkey
20. Department of Dermatology Cardiff University School of Medicine Cardiff UK
21. Department of Pharmacy, Pharmacology and Postgraduate Medicine School of Life & Medical Sciences University of Hertfordshire Hatfield UK
22. Institute of Medical Psychology Justus Liebig University Giessen Germany
23. Department of Dermatology Skåne University Hospital Malmö Sweden
24. National Center for Dual Diagnosis Innlandet Hospital Trust Brumundal Norway
25. Department of Dermatology Hôpital Erasme Brussels Belgium