- Correspondence to Xiaojian Yan, Department of Gynecology, The First Affiliated Hospital of Wenzhou Medical University, Zhejiang 325000, China; ; Dr Chunlin Chen, Department of Obstetrics and Gynecology, Nanfang Hospital, Southern Medical University, Guangzhou 510515, China;
- Received September 14, 2020
- Revision received December 23, 2020
- Accepted December 29, 2020
- First published February 19, 2021.
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