[1] Univ Amsterdam, Acad Med Ctr, Coronel Inst Occupat Hlth, Meibergdreef 15, NL-1105 AZ Amsterdam, Netherlands
[2] Dept Dermatol & Allergy, D-53105 Bonn, Germany
[3] Univ Zagreb, Fac Food Technol & Biotechnol, Dept Chem & Biochem, Analyt Chem Lab, Zagreb 10000, Croatia
[4] Univ Copenhagen, Roskilde Hosp, Dept Dermatol, DK-4000 Roskilde, Denmark
[5] Univ Toulouse, CHU Purpan, CNRS, INSERM,UMR5165, F-31059 Toulouse 9, France
[6] Univ Hosp Hamburg Eppendorf, Dept Dermatol & Venerol, D-20246 Hamburg, Germany
[7] Univ Amsterdam, Acad Med Ctr, Dept Dermatol, NL-1100 DE Amsterdam, Netherlands
[8] Univ Hosp Schleswig Holstein, Dept Dermatol Allergol & Venerol, D-24105 Kiel, Germany