1. Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden
2. Dermatology and Venereology Section, Department of Medicine Solna, Karolinska Institutet, Stockholm, Sweden
3. Unit of Dermatology, Karolinska University Hospital, Stockholm, Sweden
4. Epidemiology, Amgen, Sweden
5. Division of Nephrology, Department of Clinical Sciences, Karolinska Institutet, Danderyd Hospital, Stockholm, Sweden