1. European Hidradenitis Suppurativa Foundation e.V. Dessau Germany
2. Departments of Dermatology, Venereology, Allergology and Immunology Dessau Medical Center Brandenburg Medical School Theodor Fontane and Faculty of Health Sciences Brandenburg Dessau Germany
3. Delhi Dermatology Group Kubba Clinic New Delhi India
4. Department of Dermatology Howard University College of Medicine Washington DC USA