1. Department of Hematology, Guangzhou Women and Children's Medical Center Guangzhou Medical University Guangzhou China
2. Department of Obstetrics Beijing Obstetrics and Gynecology Hospital, Capital Medical University Beijing China
3. Department of Pathology Guangzhou Women and Children's Medical Center, Guangzhou Medical University Guangzhou China
4. Department of Biochemistry and Molecular Biology GMU‐GIBH Joint School of Life Sciences, Guangzhou Medical University Guangzhou China