Funding for this research was provided by:
Department of Education of Zhejiang Province (Y201942151)
Received: 20 April 2020
Accepted: 2 December 2020
First Online: 7 January 2021
Ethics approval and consent to participate
: This study obtained informed consent from students enrolled in the study. Students completed the questionnaire voluntarily. The work was approved by Zhejiang University (Course code: 72120240). The study protocol and implementation process were approved and supervised by the School of Obstetrics and Gynecology, Zhejiang University School of Medicine.
: Not applicable.
: The authors declared that they have no competing interests.