LAUSR

Department of Urology, Institute of Urology, West China Hospital, Sichuan University, Chengdu, China; Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University), Ministry of Education, Chengdu, China; Department of Pediatrics, West China Second University Hospital, Sichuan University, Chengdu, China Contributions: (I) Conception and design: D Feng; (II) Administrative support: L Li; (III) Provision of study materials or patients: D Feng, Z Wang, Y Yang; (IV) Collection and assembly of data: D Li, W Wei, Y Yang; (V) Data analysis and interpretation: D Feng, Z Wang; (VI) Manuscript drafting: All authors; (VII) Final approval of manuscript: All authors. These authors contributed equally to this work. Correspondence to: Li Li, PhD. Department of Pediatrics, West China Second University Hospital, Sichuan University, No. 20, Section 3, Renmin Nan Lu, Chengdu 610041, China. Email: [email protected].