1. Department of Diagnostic and Therapeutic Radiology, Faculty of Medicine, Ramathibodi Hospital, 270 Rama VI Rd, Bangkok 10400, Thailand.
2. Department Radiology, David Geffen School of Medicine at UCLA, Los Angeles, CA.
3. Department of Urology, David Geffen School of Medicine at UCLA, Los Angeles, CA.
4. Department of Pathology and Laboratory Medicine, David Geffen School of Medicine at UCLA, Los Angeles, CA.