1. Department of Pathology and Cytology F46, Karolinska University Laboratories Huddinge 14186 Stockholm Sweden
2. Dermatology and Venereology Unit Karolinska Institutet Stockholm Sweden
3. Department of Medical Epidemiology and Biostatistics Karolinska Institutet Stockholm Sweden
4. Clinical Epidemiology Unit Department of Medicine Solna Karolinska Institutet Stockholm Sweden
5. Department of Clinical Pathology and Clinical Genetics Linköping University Linköping Sweden
6. Department of Clinical and Experimental Medicine Linköping University Linköping Sweden
7. Department of Dermatology Karolinska University Hospital Stockholm Sweden
8. Hematology Centre Karolinska University Hospital Stockholm Sweden