1. Department of Clinical Laboratory, Obstetrics and Gynecology Hospital of Fudan University, No. 419 Fangxie Road, Shanghai, 200011, China
2. Department of Clinical Laboratory, International Peace Maternity and Child Health Hospital, No. 910 Hengshan Road, Shanghai, 200030, China
3. Department of Clinical Laboratory, Shanghai First Maternity and Infant Hospital, No. 536 Changle Road, Shanghai, 200040, China