[1
]
Department of Urology, University of California-San Francisco, California. Electronic
address: tchi@urology.ucsf.edu.
[2
]
Department of Urology, University of California-San Francisco, California; Division
of Urology, Faculty of Medicine, Chulalongkorn University, King Chulalongkorn Memorial
Hospital, Bangkok, Thailand.
[3
]
Department of Radiology and Biomedical Imaging, University of California-San Francisco,
California.
[4
]
Department of Urology, University of California-San Francisco, California.