[1] Univ Hosp UKSH, Dept Dermatol, Campus Kiel, Kiel, Germany
[2] Univ Med Ctr Hamburg, Inst Hlth Serv Res Dermatol & Nursing IVDP, Hamburg, Germany
[3] Eberhard Karls Univ Tuebingen, Dept Dermatol, Tubingen, Germany
[4] Eberhard Karls Univ Tubingen, Tubingen, Germany
[5] Hannover Med Sch, Hannover, Germany
[6] Schleswig Holstein Univ Hosp, Kiel, Germany
[7] Univ Hosp Erlangen, Dept Dermatol, Erlangen, Germany
[8] Univ Hosp Essen, Dept Dermatol, Essen, Germany
[9] Univ Hosp Mainz, Dept Dermatol, Mainz, Germany
[10] Univ Med Ctr Mainz, Mainz, Germany
[11] Univ Hosp Essen, Essen, Germany
[12] Univ Lubeck, Lubeck, Germany