1. Department of Gynecology and Obstetrics West China Second University Hospital Sichuan University Chengdu China
2. West China School of Medicine Sichuan University 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 Thyroid & Parathyroid Surgery West China Hospital Sichuan University Chengdu China
5. MOHH Holdings Singapore City Singapore