1. Research Unit for General Practice and Section of General Practice; Department of Public Health; University of Copenhagen; Copenhagen Denmark
2. Department of Hematology; Roskilde University Hospital; Roskilde Denmark
3. Departments of Hematology and Medicine; The Karolinska Institute at Karolinska University Hospital Huddinge; Stockholm Sweden
4. Department of Hematology; Copenhagen University Hospital; Copenhagen Denmark
5. The Elective Laboratory of the Capital Region; Copenhagen Denmark