Funding for this research was provided by:
National Natural Science Foundation of China (81372809, 81874105)
National Key Research & Development Program of China (2016YFC1302903)
National Clinical Research Center for Gynecological Oncology (2015BAI13B05)
Received: 24 September 2019
Accepted: 1 January 2020
First Online: 21 May 2020
Ethics approval and consent to participate
: All procedures in studies involving human participants were performed in accordance with ethical standards and approved by the Ethics Committee of Shandong University [2018 (054)].
: The manuscript was approved for publication by all authors.
: The authors declare that they have no competing interests.