1. Coronavirusdisease2019(COVID-19) and pregnancy: what obstetricians need to know;Rasmussen;Am J Obstet Gynecol,2020
2. Royal College of Obstetricians and Gynaecologists (RCOG). (2020). Coronavirus (COVID-19) Infection in Pregnancy. Version 1, London.
3. American College of Obstetricians and Gynecologists. Practice advisory: novel coronavirus 2019 (COVID-2019). https://www.acog.org/Clinical-Guidance-and-Publications/PracticeAdvisories/Practice-Advisory-Novel-Coronavirus2019. Accessed March 16, 2020.
4. Applied psychometrics;Thorndike,1982
5. Knowledge, attitudes, and practices towards COVID-19 among Chinese residents during the rapid rise period of the COVID-19 outbreak: a quick online cross-sectional survey;Zhong;Int J Biol Sci,2020