1. Department of Dermatology; Venereology, and Allergology; University Hospital Essen; Essen Germany
2. B. Braun Melsungen AG; Melsungen Germany
3. Coloplast GmbH; Hamburg Germany
4. Smith & Nephew GmbH; Hamburg Germany
5. URGO GmbH; Sulzbach Germany
6. Joint Dermatology Practice Bramfeld; Hamburg Germany