Zhang G, Feng F, Wang W, Zhu L
Department of Obstetrics and Gynaecology, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, China.
BJOG. 2020 May;127(6):768-771. doi: 10.1111/1471-0528.16156. Epub 2020 Mar 2.