1. Division of Dermatology Department of Medicine National University Hospital Singapore City Singapore
2. Department of Medicine NUS Yong Loo Lin School of Medicine Singapore City Singapore
3. Department of Dermatology St. Vincent’s Hospital College of Medicine The Catholic University of Korea Suwon Korea
4. Department of Dermatology Meiwa Hospital Nishinomiya Japan
5. European Hidradenitis Suppurativa Foundation e.V. Dessau Germany