Funding for this research was provided by:
the Natural Science Foundation of Inner Mongolia Autonomous Region of China (2018LH08037)
Article History
Received: 10 March 2019
Accepted: 30 May 2019
First Online: 10 June 2019
Compliance with ethical standards
:
: The authors declare that they have no conflict of interest.
: Pessary is a noninvasive test and treatment, which is voluntarily chosen and informed about to the patients before using, so Institutional Review Board approval was exempted for the study.