[1] Lund Univ, Skane Univ Hosp, Dept Occupat & Environm Dermatol, Malmo, Sweden
[2] Lulea Univ Technol, Dept Hlth Educ & Technol, Lulea, Sweden
[3] Univ Hosp Heidelberg, Dept Dermatol, Occupat Dermatol, Heidelberg, Germany
[4] Skane Univ Hosp, Dept Occupat & Environm Dermatol, Jan Waldenstroms Gata 16, S-20502 Malmo, Sweden