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.
Qian G, Yang N, Ma AHY, Wang L, Li G, Chen X, Chen X.Qian G, et al. Among authors: chen x.Clin Infect Dis. 2020 Jul 28;71(15):861-862. doi: 10.1093/cid/ciaa316.Clin Infect Dis. 2020.PMID: 32201889Free PMC article.
Qian G, Lin Y, Chen X, Ma AHY, Zhang X, Li G, Ruan X, Ruan L.Qian G, et al. Among authors: chen x.Singapore Med J. 2022 Apr;63(4):219-224. doi: 10.11622/smedj.2021004. Epub 2021 Jan 21.Singapore Med J. 2022.PMID: 33472338Free PMC article.