1. Department of Pediatric Urology, Bayi Children's Hospital, Affiliated to Chinese PLA Army General Hospital, Beijing, People's Republic of China.
2. Department of Pediatric Urology, Anhui Provincial Children's Hospital, Hefei, People's Republic of China.
3. Department of Urology, The Second Hospital of Hebei Medical University, Shijiazhuang, People's Republic of China.
4. Department of Urology, The People's Hospital of Guangxi Zhuang Autonomous Region, Nanning, People's Republic of China.
5. Department of Pediatric Surgery, Guizhou Provincial People's Hospital, Guiyang, People's Republic of China.
6. Department of Pediatric Urology, Hubei Provincial Maternal and Child Healthcare Hospital, Wuhan, People's Republic of China.
7. Department of Pediatric Surgery, The Capital Institute of Pediatrics, Beijing, People's Republic of China.