1. Medicine School of Xi'an Jiaotong University; Xi'an; Shaanxi; China
2. Morphological Experiment Centre, Medicine School of Xi'an Jiaotong University; Xi'an; Shaanxi; China
3. Department of Urology of First Affiliated Hospital of Medicine School, Xi'an Jiaotong University; Xi'an; Shaanxi; People's Republic of China
4. Department of Nephrology of First Affiliated Hospital of Medicine School, Xi'an Jiaotong University; Xi'an; Shaanxi; People's Republic of China