Funding for this research was provided by:
Zhejiang Provincial Natural Science Foundation of China (LY20H160029)
Received: 21 March 2020
Accepted: 18 May 2020
First Online: 3 June 2020
Ethics approval and consent to participate
: This study was conducted in accordance with the Declaration of Helsinki. All patients provided written informed consent before screening. This study was approved by the Ethical Committee of the Affiliated Women’s Hospital, School of Medicine, Zhejiang University (Reference number: IRB-20200050-R).
: Not applicable.
: The authors declare that they have no competing interests.