1. Department of Medicine; Clinical Epidemiology Unit; Karolinska Institutet and Karolinska University Hospital; Stockholm Sweden
2. Department of Medicine; Division of Hematology; Karolinska Institutet and Karolinska University Hospital; Stockholm Sweden
3. Department of Oncology; Norrlands University Hospital; Umeå Sweden
4. Department of Immunology, Genetics and Pathology, Experimental and Clinical Oncology; Uppsala University; Sweden