1. European Hidradenitis Suppurativa Foundation e.V. Dessau Germany
2. 4th Department of Internal Medicine Medical School National and Kapodistrian University of Athens Athens Greece
3. Department of Medical Sciences O.U. of Dermatology Azienda Ospedaliera – University of Ferrara Ferrara Italy
4. Department of Dermatology Zealand University Hospital Faculty of Health Science University of Copenhagen Denmark
5. Institute of Clinical Medicine Faculty of Health Science University of Copenhagen Copenhagen Denmark
6. Department of Dermatology Hôpital Erasme Universite Libre de Bruxelles Bruxelles Belgium
7. Dermatology Unit Fondazione IRCCS Ca’ Granda Ospedale Maggiore Policlinico Milan Italy
8. Department of Pathophysiology and Transplantation Università degli Studi di Milano Milan Italy
9. Laboratory for Experimental Immunodermatology Erasmus University Medical Center Rotterdam Rotterdam Netherlands
10. Department of Dermatology Erasmus University Medical Center Rotterdam Rotterdam Netherlands
11. Department of Dermatology NLSH University Hospital Bodø Norway
12. Departments of Dermatology, Venereology, Allergology and Immunology Dessau Medical Center Brandenburg Medical School Theodor Fontane and Faculty of Health Sciences Brandenburg Dessau Germany