1. Department of Urology, Peking Union Medical College Hospital, Chinese Academy of Medical Science and Peking Union Medical College, Beijing 100730, P.R. China
2. Core Facility of Instrument, Institution of Basic Medical Sciences, Chinese Academy of Medical Sciences, School of Basic Medical College, Beijing 100730, P.R. China
3. Clinical Research Center, National Center for Children's Health, Beijing Children's Hospital, Capital Medical University, Beijing 100045, P.R. China
4. School of Humanities and Social Sciences, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, P.R. China