1. Clinical Epidemiology Unit IDI‐IRCCS Rome Italy
2. Institute of Medical Psychology Justus‐Liebig‐University Gießen Gießen Germany
3. Barts Health NHS Trust & Queen Mary University London UK
4. Institute of Infection and Immunity, School of Medicine Cardiff University Cardiff UK
5. Department of Dermatology Justus‐Liebig‐ University Giessen and Vitos Klinik Giessen Germany
6. South Wales Clinical Psychology Programme, Cardiff & Vale University Health Board, & School of Psychology Cardiff University Cardiff UK
7. Miguel Servet University Hospital, IIS Aragón Universidad de Zaragoza Zaragoza Spain
8. Department of Dermatology Stavanger University Hospital Stavanger Norway
9. Department of Public Health, Faculty of Health Sciences University of Stavanger Norway
10. Department of Dermatology Coimbra University Hospital Coimbra Portugal
11. Department of Dermatology Zealand University Hospital Roskilde Denmark
12. Faculty of Health and Medical Sciences University of Copenhagen Copenhagen Denmark
13. Norwegian National Advisory Unit on Concurrent Substance Abuse and Mental Health Disorders Innlandet Hospital Trust Brumunddal Norway
14. Faculty of Social and Health Sciences Inland Norway University of Applied Sciences Elverum Norway
15. Department of Dermatology University Hospital of Brest Brest France
16. Department of Dermatology University Hospital Miguel Servet, Aragon Psychodermatology Research Group (GAI+PD) Zaragoza Spain
17. Department of Dermatology University Clinic Münster Münster Germany
18. Institute of Psychology University of Szeged Szeged Hungary
19. Department of Dermatology, Venereology and Allergology Wroclaw Medical University Wroclaw Poland
20. Department of Dermatology, Institute of Medical Sciences Medical College of Rzeszow University Rzeszów Poland
21. Department of Dermatology and Venereology Skåne University Hospital Malmo Sweden
22. Şişli Hamidiiye Etfal Research and Training Hospital, Department of Dermatology and Venereology University of Health Sciences Istanbul Turkey
23. Department of Dermatology Medical University of Graz Graz Austria
24. School of Medicine, PHI University Clinic of Dermatology Skopje University St Cyril and Methodius Skopje North Macedonia
25. Department of Psychiatry and Psychosomatics I.M. Sechenov First Moscow State Medical University (Sechenov University) Moscow Russia
26. Department of Boundary Mental Conditions and Psychosomatic Disorders Mental Health Research Center Moscow Russia
27. Department of Dermatovenereology and Cosmetology Central State Medical Academy of Department of Presidential Affairs Moscow Russia
28. Medical Research and Educational Center Lomonosov Moscow State University Moscow Russia
29. Department of Dermatology/Clinique Notre Dame de Grâce Gosselies Belgium
30. Department of Psychiatry, Amsterdam UMC, Location Academic Medical Center University of Amsterdam Amsterdam the Netherlands
31. Department of Psychology University of Zaragoza Zaragoza Spain
32. Institute of Psychology, Health, Medical and Neuropsychology Unit Leiden University Leiden the Netherlands
33. Division of Mental Health and Addiction Vestfold Hospital Trust Tønsborg Norway