Recent sex ratio at birth in China
Crossref DOI link: https://doi.org/10.1136/bmjgh-2021-005438
Published Online: 2021-05-18
Published Print: 2021-05
Update policy: https://doi.org/10.1136/crossmarkpolicy
Jiang, Quanbao
Zhang, Cuiling
License valid from 2021-05-18