[1] Ruhr Univ Bochum, Int Ctr Hidradenitis Suppurativa Acne Inversa ICH, Dept Dermatol Venereol & Allergol, Bochum, Germany
[2] Ruhr Univ Bochum, Skin Canc Ctr, Dept Dermatol Venereol & Allergol, Bochum, Germany
[3] Christian Hosp Unna, Dept Dermatol & Phlebol, Unna, Germany
[4] Witten Herdecke Univ, Dortmund Hosp, Fac Hlth, Sch Med,Dept Dermatol, Dortmund, Germany