[1] Karolinska Inst, Dept Mol Med & Surg, Stockholm, Sweden
[2] Karolinska Inst, Dermatol Unit, Stockholm, Sweden
[3] Karolinska Inst, Dept Med, Stockholm, Sweden
[4] Karolinska Inst, Inst Environm Med, Stockholm, Sweden
[5] Karolinska Inst, Ctr Allergy Res, Stockholm, Sweden
[6] Karolinska Inst, Dept Biosci, Stockholm, Sweden
[7] Karolinska Inst, Dept Clin Neurosci, Stockholm, Sweden
[8] Stockholm Cty Council, Dept Occupat & Environm Hlth, Stockholm, Sweden
[9] Stanford Univ, Sch Med, Dept Biochem, Stanford, CA 94305 USA
[10] Univ London Kings Coll, St Johns Inst Dermatol, London WC2R 2LS, England
[11] Univ Newcastle Upon Tyne, Newcastle Upon Tyne NE1 7RU, Tyne & Wear, England
[12] Royal Victoria Infirm, Dept Dermatol, Newcastle Upon Tyne NE1 4LP, Tyne & Wear, England