1. Department of Pediatric Surgery; Pediatric Urodynamic Centre of the First Affiliated Hospital of Zhengzhou University; Zhengzhou City, Henan China
2. Institute of Clinical Medical Research of Henan Universities; Zhengzhou City, Henan China
3. Department of Urology; The First Affiliated Hospital of Zhengzhou University; Zhengzhou City, Henan China
4. The Nursing College of Henan University; Kaifeng City, Henan China