[1] Univ Hosp Mannheim, Skin Canc Unit, German Canc Res Ctr Heidelberg, Dept Dermatol, D-68167 Mannheim, Germany
[2] German Canc Res Ctr, Div Mol Genet Epidemiol, D-6900 Heidelberg, Germany
[3] Inst Valenciano Oncol, Dept Oncol, Valencia, Spain
[4] Karolinska Inst, Ctr Family Med, Huddinge, Sweden
[5] Univ Hosp, Dept Dermatol, Essen, Germany