1. Center for Industrial and Medical Ultrasound, Applied Physics Laboratory, University of Washington, Seattle, Washington.
2. Department of Urology, University of Washington School of Medicine, Seattle, Washington.
3. Division of Urology, Department of Veteran Affairs Medical Center, Seattle, Washington.
4. Department of Radiology, University of Washington School of Medicine, Seattle, Washington.
5. Department of Biostatistics, Indiana University-Purdue University Indianapolis, Indianapolis, Indiana.