1. School for Physiology Nutrition and Consumer Sciences North‐West University Potchefstroom North‐West province South Africa
2. National Institute for Occupational Safety and Health Morgantown West Virginia USA
3. Department of Dermatology Environmental Medicine Health Theory University of Osnabrueck Osnabrueck Germany
4. Bispebjerg Hospital University of Copenhagen Copenhagen Denmark
5. Department of Public Health College of Public Health China Medical University Taichung Taiwan
6. Occupational Dermatology Research and Education Centre Skin and Cancer Foundation Inc. Carlton Victoria Australia
7. Environmental and Occupational Medicine University of Aberdeen Aberdeen UK
8. Department of Occupational and Environmental Health St. Michael's Hospital Toronto Ontario Canada