Affiliation: | a Department of Urology, Northwestern University Feinberg School of Medicine, Chicago, Illinois b Department of Urology, The Johns Hopkins University School of Medicine, Baltimore, Maryland c Department of Pathology, The Johns Hopkins University School of Medicine, Baltimore, Maryland d Division of Urology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts e Department of Urology, University of Michigan School of Medicine, Ann Arbor, Michigan f Department of Pathology, Mayo Clinic, Rochester, Minnesota g Department of Urology, Erasmus University Medical Center, Rotterdam, The Netherlands h Department of Clinical Chemistry, Erasmus University Medical Center, Rotterdam, The Netherlands i Vanguard Urologic Institute and Texas Prostate Center, Houston, Texas j Department of Urology, University of California-Los Angeles, Los Angeles, California k Beckman Coulter, Inc., Carlsbad, California l ARUP Laboratories, Department of Pathology, University of Utah, Salt Lake City, Utah |