[1] Univ Gothenburg, Sahlgrenska Acad, Inst Clin Sci, Dept Dermatol & Venereol, Gronastraket 16, S-41345 Gothenburg, Sweden
[2] Sahlgrens Univ Hosp, Reg Vastra Gotaland, Dept Dermatol & Venereol, Gothenburg, Sweden
[3] Skaraborg Hosp, Reg Vastra Gotaland, Dept Dermatol & Venereol, Skovde, Sweden