1. Faculty of Medicine, University of Iceland, Reykjavik, Iceland;
2. Division of Hematology, Department of Medicine, Karolinska University Hospital and Karolinska Institutet, Stockholm, Sweden;
3. Multiple Myeloma Section, National Cancer Institute, National Institutes of Health, Bethesda, MD;
4. Myeloma Service, Division of Hematologic Oncology, Memorial Sloan Kettering Cancer Center, New York, NY;
5. Icelandic Heart Association, Kopavogur, Iceland; and
6. National Institute on Aging, National Institutes of Health, Bethesda, MD