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.
Kong L, Ma Y, Ren M, Xu M, Cheung C.Kong L, et al. Among authors: cheung c.Sci Prog. 2020 Jan-Mar;103(1):36850419880112. doi: 10.1177/0036850419880112. Epub 2019 Oct 10.Sci Prog. 2020.PMID: 31829886Free PMC article.
Wang S, Cheung C, Ren M, Liu M.Wang S, et al. Among authors: cheung c.Opt Express. 2018 Jul 23;26(15):18928-18943. doi: 10.1364/OE.26.018928.Opt Express. 2018.PMID: 30114152Free article.
Wang S, Cheung CF, Ren M, Liu M.Wang S, et al.Micromachines (Basel). 2018 Jan 30;9(2):52. doi: 10.3390/mi9020052.Micromachines (Basel). 2018.PMID: 30393328Free PMC article.