1. Coronel Institute of Occupational Health, Academic Medical Centre University of Amsterdam Amsterdam Meibergdreef 15, 1105 AZ The Netherlands
2. Centre for Dermatology and Genetic Medicine, Colleges of Life Sciences and Medicine, Dentistry & Nursing, Medical Sciences Institute University of Dundee Dundee Dow Street, DD1 5EH UK
3. Netherlands Centre for Occupational Diseases, Academic Medical Centre University of Amsterdam Amsterdam Meibergdreef 15, 1105 AZ The Netherlands
4. Department of Dermatology Academic Medical Centre, University of Amsterdam Amsterdam Meibergdreef 15, 1105 AZ The Netherlands