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.
Yon MJY, Chen KJ, Gao SS, Duangthip D, Lo ECM, Chu CH.Yon MJY, et al. Among authors: chu ch.Int J Environ Res Public Health. 2020 Apr 20;17(8):2827. doi: 10.3390/ijerph17082827.Int J Environ Res Public Health. 2020.PMID: 32325972Free PMC article.
Lo EC, Yeung JC, Chu CH.Lo EC, et al. Among authors: chu ch.Int Dent J. 2002 Aug;52(4):261-7. doi: 10.1111/j.1875-595x.2002.tb00628.x.Int Dent J. 2002.PMID: 12212813
Chu CH, Wong AW, Lo EC, Courtel F.Chu CH, et al.Int Dent J. 2008 Feb;58(1):15-22. doi: 10.1111/j.1875-595x.2008.tb00172.x.Int Dent J. 2008.PMID: 18350849