1. Department of Urinary Surgery, Xi'an Jiaotong University, Xi'an, China;
2. Urology Surgery Affiliated Hospital of Yan'an University, Yan'an, China;
3. Office For Disease Control And Prevention, Affiliated Hospital of Yan'an University, Yan'an, China;
4. The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China;
5. Innoscience Research Bhd., Malaysia