1. Department of Obstetrics and Gynecology, the Third Affiliated Hospital of Zhengzhou University, Zhengzhou, China;
2. Department of Pathology and Laboratory Medicine, University of Tennessee Health Science Center, Memphis, TN, USA;
3. Department of Clinical Laboratory, the Third Affiliated Hospital of Zhengzhou University, Zhengzhou, China;
4. Collaborative Innovation Center of Molecular Diagnosis and Laboratory Medicine, School of Laboratory Medicine, Xinxiang Medical University, Xinxiang, China;
5. Shangqiu Medical College, Shangqiu, China