1. Department of Urology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA
2. Department of Urology, Shaanxi Provincial People's Hospital, Xi’an, Shaanxi 710068, China
3. Department of Urology, The First Affiliated Hospital, Medical School of Xi'an Jiaotong University, Xi'an 710049, China
4. Department of Microbiology and Immunology, Chang Gung University, Taoyuan 333, Taiwan
5. Department of Life Sciences, National Chung Hsing University, Taichung 402, Taiwan
6. Graduate Institute of Cancer Biology, China Medical University Hospital, Taichung 40447, Taiwan, Republic of China