1. Department of Pediatrics, West China Second University Hospital, Sichuan University, Chengdu, China
2. Key Laboratory
of Birth Defects and Related Diseases of Women and Children, Sichuan University, Ministry of Education, Chengdu,
China
3. Key Laboratory of Birth Defects and Related Diseases of Women and Children, Sichuan University, Ministry of Education, Chengdu,
China
4. Department of Radiology, West China Second University Hospital, Sichuan University, Chengdu, China