1. Department of Dermatology; Roskilde Hospital; Køgevej 7-13 4000 Roskilde Denmark
2. Department of Development and Health; Research Centre for Prevention and Health; Glostrup University Hospital; Nordre Ringvej 57, 2600 Glostrup Denmark
3. Department of Diagnostic Sciences; Faculty of Health and Medical Sciences; University of Copenhagen; Blegdamsvej 3B, 2200 Copenhagen N Denmark
4. Department of Clinical Biochemistry; Naestved Hospital; Ringstedgade 61, 4700 Naestved Denmark
5. Faculty of Health and Medical Sciences; University of Copenhagen; Blegdamsvej 3B 2200 Copenhagen N Denmark