1. Center for Prostate Disease Research, Murtha Cancer Center Research Program, Department of Surgery, Uniformed Services University of the Health Sciences, Bethesda, Maryland 20889, United States
2. Henry M. Jackson Foundation for the Advancement of Military Medicine, Inc., Bethesda, Maryland 20817, United States
3. Division of Radiation & Cancer Biology, Department of Radiation Oncology, Stanford University School of Medicine, Stanford, California 94305, United States
4. Washington Adventist University, Takoma Park, Maryland 20912, United States