1. Department of Dermatology and Allergy Centre; Odense University Hospital, University of Southern Denmark; DK-5000; Odense C; Denmark
2. Department of Chemical Engineering, Biotechnology and Environmental Technology; University of Southern Denmark; DK-5230; Odense M; Denmark
3. Department of Occupational Dermatology; Skåne University Hospital; 205 02; Malmö; Sweden