1. Department of Urology, Chang Gung Memorial Hospital at Linkou, Tao-Yuan, Taiwan, Republic of China;
2. School of Medicine, Chang Gung University, Tao-Yuan, Taiwan, Republic of China;
3. Graduate Institute of Clinical Medical Sciences, College of Medicine, Chang Gung University, Tao-Yuan, Taiwan, Republic of China;
4. Division of Cardiology, Department of Internal medicine, Chang Gung Memorial Hospital, Keelung, Taiwan, Republic of China;
5. Department of Anatomy, School of Medicine, Chang Gung University, Tao-Yuan, Taiwan, Republic of China