1. Department of Clinical Pathology; Sahlgrenska University Hospital; Institute of Biomedicine at the Sahlgrenska Academy; University of Gothenburg; Gothenburg Sweden
2. Department of Dermatology and Allergology; Päijät-Häme Social and Health Care Group; Lahti Finland
3. Department of Mathematical Information Technology; University of Jyväskylä; Jyväskylä Finland
4. Departments of Dermatology and Allergology; University of Helsinki and Helsinki University Hospital; Helsinki Finland
5. Department of Dermatology; University of Tampere and Tampere University Hospital; Tampere Finland