[1] Univ Hosp Heidelberg, Dept Clin Social Med Occupat & Environm Dermatol, D-69115 Heidelberg, Germany
[2] Univ Copenhagen, Dept Dermatol, DK-4000 Copenhagen, Denmark
[3] Graz Univ, Dept Dermatol, A-8036 Graz, Austria
[4] Univ Hosp Coventry & Warwickshire NHS Trust, Dept Dermatol, Coventry CV2 2DX, W Midlands, England
[5] Dept Dermatol, F-42055 St Etienne, France
[6] Univ Jena, Dept Dermatol & Allergol, D-07740 Jena, Germany
[7] St Thomas Hosp, St Johns Inst Dermatol, London, England
[8] Univ Groningen, Univ Med Ctr, Dept Dermatol, NL-9700 RB Groningen, Netherlands