- Correspondence to Bin Li, Department of Gynecology Oncology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China;
- Received July 21, 2018
- Revision received November 23, 2018
- Accepted November 29, 2018
- First published February 6, 2019.
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