Dong Huanhuan, Feng Lufang, Zhang Na, Zhu Zeshan, Liu Xingrong
School of Public Health, Lanzhou University, Lanzhou, PR China.
Gansu Provincial Hospital Management Center (Gansu Provincial Family Planning Medicine Station), Lanzhou, PR China.
J Glob Health. 2021 Jan 13;11:03001. doi: 10.7189/jogh.11.03001.