1. Department of Clinical Epidemiology Aarhus University Hospital Aarhus Denmark
2. Department of Clinical Biochemistry Aarhus University Hospital Aarhus Denmark
3. Clinical Epidemiology Unit & Center for Pharmacoepidemiology Department of Medicine, Solna Karolinska Institutet Stockholm Sweden
4. Department of Medicine Østfold Hospital Trust Sarpsborg and Department of Hematology Institute of Clinical Medicine Oslo University Oslo Norway
5. Center for Observational Research Amgen Thousand Oaks California
6. Department of Hematology Odense University Hospital Odense Denmark