1. Department of Medicine, Division of Hematology, Karolinska University Hospital Solna and Karolinska Institutet, Stockholm, Sweden;
2. Division of Cancer Epidemiology and Genetics, National Cancer Institute (NCI), National Institutes of Health (NIH), Bethesda, MD;
3. Center for Cancer Research, NCI, NIH, Bethesda, MD;
4. Department of Medicine, Section of Hematology and Coagulation, Sahlgrenska University Hospital, Gothenburg, Sweden;
5. Department of Hematology, Skåne University Hospital, Malmö, Sweden; and
6. Cancer Centre, Section of Hematology, Umeå University Hospital, Umeå, Sweden