1. Graduate Institute of Biomedical Sciences; College of Medicine; Chang Gung University; Tao-Yuan City 33302 Taiwan
2. Graduate Institute of Clinical Medical Sciences; College of Medicine; Chang Gung University; Tao-Yuan City 33302 Taiwan
3. Department of Dermatology; Chang Gung Memorial Hospital; Taipei 10548 Taiwan
4. Division of Urology; Department of Surgery; Chang Gung Memorial Hospital; Tao-Yuan City 33302 Taiwan
5. Department of Pediatric Surgery; Chang Gung Children's Hospital; Chang Gung Memorial Hospital; Tao-Yuan City 33302 Taiwan