1. Department of Medical Informatics; Biometry and Epidemiology; Friedrich-Alexander-University Erlangen/Nürnberg; Erlangen Germany
2. Department of Dermatology; University Hospital of Puerto Real; Cádiz Spain
3. Department of Advanced Biomedical Sciences; University of Naples Federico II; Napoli Italy
4. Department of Dermatology; University Hospital Zürich; Zürich Switzerland
5. Centre for Dermatology and Allergology; Kantonsspital Luzern; Luzern Switzerland
6. Department of Dermatology; University Hospital Carl Gustav Carus; Technical University of Dresden; Dresden Germany
7. Pediatric Dermatology Unit; Department of Medicine DIMED; University of Padova; Padova Italy
8. Allergology Unit; Department of Dermatology; University Hospital Basel; Basel Switzerland
9. The Welsh Institute of Dermatology; University Hospital of Wales; Cardiff UK
10. Churchill Hospital; Oxford UK
11. Department of Dermatology; University of Medical Sciences; Poznan Poland
12. Department of Dermatology; University Medical Center Maribor; Maribor Slovenia
13. Clinica Dermatologica; IRCCS - AOU San Martino - IST and Department of Health Sciences; University of Genoa; Genoa Italy
14. Department of Dermatology; Hospital del Mar; Universitat Autónoma; Barcelona Spain
15. National Allergy Centre/Department of Dermatology; Gentofte Hospital; University of Copenhagen; Hellerup Denmark
16. Department of Dermatology; Institute for Interdisciplinary Dermatologic Prevention and Rehabilitation (iDerm); University of Osnabrück; Lower Saxony Institute for Occupational Dermatology (NIB); Osnabrück Germany
17. Department of Dermatology; Nofer Institute of Occupational Medicine; Łodz Poland
18. Department of Dermatology; General Hospital Celje; Celje Slovenia
19. Faculty of Medicine and Health Science; Institute of Medical Science; Jan Kochanowski University; Kielce Poland
20. Department of Public Health, Occupational Medicine; University of Trieste; Trieste Italy
21. Department of Dermatology; University Hospital Erlangen; Friedrich-Alexander-University Erlangen-Nürnberg; Erlangen Germany
22. Occupational Medicine; Finnish Institute of Occupational Health (FIOH); Helsinki Finland
23. Department of Dermatology; Free University of Amsterdam; Amsterdam The Netherlands
24. Department of Dermatology; Hospital Universitario la Princesa; Madrid Spain
25. Department of Dermatology and Allergology; University Hospital Jena; Jena Germany
26. Department of Dermatology; University Medical Centre Groningen; University of Groningen; Groningen The Netherlands
27. Department of Dermatology; Inselspital; Bern University Hospital; University of Bern; Bern Switzerland
28. Department of Experimental Dermatology and Cosmetology; Faculty of Pharmacy; Jagiellonian University Medical College; Krakow Poland
29. Department of Skin and Venereal Diseases; Lithuanian University of Health Sciences; Kaunas Lithuania
30. Department of Clinical Social Medicine; University Hospital Heidelberg; Heidelberg Germany
31. St. John's Institute of Dermatology; Guy's Hospital; London UK
32. Dermatology; Leeds Teaching Hospitals NHS Trust; Leeds UK