1. Experimental and Clinical Oncology, Department of Immunology, Genetics and Pathology, and
2. Clinical and Experimental Pathology, Department of Immunology, Genetics and Pathology, Uppsala University, Uppsala, Sweden;
3. Section of Epidemiology Research, Department of Hematology, Copenhagen University Hospital, Copenhagen, Denmark;
4. Institute of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark;
5. Division of Clinical Epidemiology, Department of Medicine, Solna, Karolinska Institutet, Stockholm, Sweden; and
6. Department of Hematology, Karolinska University Hospital, Stockholm, Sweden