1. Department of Urology Surgery Children's Hospital of Chongqing Medical University Ministry of Education Key Laboratory of Child Development and Disorder Key Laboratory of Pediatrics in Chongqing (CSTC2009CA5002) Chongqing International Science and Technology Cooperation Center for Child Development and Disorders Chongqing China
2. Chengdu Women and Children's Central Hospital Chengdu China
3. Chengdu Center for Disease Control and Prevention Chengdu China