[1] Univ Med Ctr Hamburg, Inst Hlth Serv Res Dermatol & Nursing IVDP, Hamburg, Germany
[2] Eberhard Karls Univ Tubingen, Dept Dermatol, Tubingen, Germany
[3] Hannover Med Sch, Dept Dermatol, Skin Canc Ctr Hannover, Hannover, Germany
[4] Univ Hosp Schleswig Holstein UKSH, Dept Dermatol, Skin Canc Ctr, Campus Kiel, Kiel, Germany
[5] Univ Hosp Erlangen, Dept Dermatol, Erlangen, Germany
[6] Univ Duisburg Essen, Univ Hosp Essen, Dept Dermatol, Essen, Germany
[7] Johannes Gutenberg Univ Mainz, Dept Dermatol, Mainz, Germany
[8] German Canc Res Ctr, Skin Canc Unit, Heidelberg, Germany
[9] Univ Med Ctr Mannheim, Dept Dermatol Venereol & Allergol, Mannheim, Germany