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.
Chung LMY, Chung JWY, Chan APC.Chung LMY, et al.Int J Environ Res Public Health. 2019 Dec 2;16(23):4852. doi: 10.3390/ijerph16234852.Int J Environ Res Public Health. 2019.PMID: 31810334Free PMC article.
Chung L, Wong T, Chung JW.Chung L, et al.J Child Health Care. 2010 Sep;14(3):280-95. doi: 10.1177/1367493510374065. Epub 2010 Jun 11.J Child Health Care. 2010.PMID: 20542927