1. Division of Urology, Department of Surgery, Chang Gung Memorial Hospital, Linkou Branch, Taoyuan 333423, Taiwan, R.O.C.
2. School of Medicine, College of Medicine, Chang Gung University, Taoyuan 33302, Taiwan, R.O.C.
3. Department of Medical Imaging and Intervention, New Taipei Municipal Tucheng Hospital, New Taipei 236017, Taiwan, R.O.C.