An official website of the United States government
The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before
sharing sensitive information, make sure you’re on a federal
government site.
The site is secure.
The https:// ensures that you are connecting to the
official website and that any information you provide is encrypted
and transmitted securely.
Liu Y, Li ZF, Zhong YH, Zhao ZH, Deng WX, Chen LL, Liu BB, Du TJ, Zhang Y.Liu Y, et al. Among authors: zhao zh.BMC Pediatr. 2021 Jun 9;21(1):269. doi: 10.1186/s12887-021-02727-8.BMC Pediatr. 2021.PMID: 34107905Free PMC article.
Zhou Y, Zhao ZH, Fan XH, Li WH, Chen Z.Zhou Y, et al. Among authors: zhao zh.Evid Based Complement Alternat Med. 2021 Mar 15;2021:6665642. doi: 10.1155/2021/6665642. eCollection 2021.Evid Based Complement Alternat Med. 2021.PMID: 33815557Free PMC article.Review.
Zhao Z, Zhou Y, Li W, Fan X, Huang Q, Tang Z, Li H, Wang J, Li J, Wu J.Zhao Z, et al.Int J Health Plann Manage. 2022 May;37(3):1205-1220. doi: 10.1002/hpm.3419. Epub 2022 Jan 21.Int J Health Plann Manage. 2022.PMID: 35064592Free PMC article.