Liu WQ, Yang JX, Zhang J, et al. Consensus on technological standards for noninvasive prenatal screening of pathogenic copy number variations by high-throughput sequencing of maternal plasma cell-free DNA[J]. Chin J Med Genet, 2021, 38(7): 613-619. DOI: 10.3760/cma.j.cn511374-20201208-00855.
He Y. Beijing launches 220 vaccination sites: nine kind of key populations are vaccinated against COVID-19[N/OL]. People′s Daily, 2021-01-04(13)[2021-01-16]. http://paper.people.com.cn/rmrb/html/2021-01/04/nw.D110000renmrb_20210104_3-13.htm.
Yin K. "Publishing professional and technical personnel continuing education online service platform" started[EB/OL]. (2020-12-11) [2021-01-16]. http://www.nppa.gov.cn/nppa/contents/280/75361.shtml.