Funding for this research was provided by:
Scientific research foundation of Jiangsu Provincial 333 Project (BRA2015541, BRA2016555)
Medical scientific research project of Jiangsu Provincial Commission of Health and Family Planning (No. H2018041)
Medical youth talent projects in Jiangsu Province (No. QNRC2016314)
Postgraduate Research & Practice Innovation Program of Jiangsu Province (No. KYCX18_1497)
Received: 31 July 2019
Accepted: 8 December 2019
First Online: 16 December 2019
Ethics approval and consent to participate
: The Ethics Review Committee of Yangzhou WuTaiShan Hospital approved the study (NO. 201602). All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. Informed written consent was obtained from all participants prior to the commencement of the study.
: Not applicable.
: The authors declare that they have no competing interests.