1. Institute of Clinical Chemistry and Laboratory Medicine, University Medical Center Hamburg-Eppendorf, Hamburg, Germany;
2. Division of Clinical Chemistry, Department of Molecular Medicine and Surgery, Karolinska Institutet, Stockholm, Sweden;
3. Center of Molecular Medicine, Karolinska University Hospital, Stockholm, Sweden;
4. Clinical Chemistry, Department of Medical Sciences, Clinical Chemistry, University Hospital of Uppsala, Uppsala, Sweden;
5. Clinical Department of Hematology and Oncology, Center for Oncology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany;
6. Institute for Pathology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany;
7. Martini-Clinic, Prostate Cancer Center, University Medical Center Hamburg-Eppendorf, Hamburg, Germany;
8. Division of Hematology/Oncology, Department of Medicine, University of North Carolina, Chapel Hill, NC;
9. Divisions of Hematology and Oncology, Department of Medicine, Case Western Reserve University, Cleveland, OH; and
10. Department of Medicine, Louis Stokes Veterans Administration Hospital, Cleveland, OH