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.
Chang CI, Chan DC, Kuo KN, Hsiung CA, Chen CY.Chang CI, et al.J Formos Med Assoc. 2011 Apr;110(4):247-57. doi: 10.1016/S0929-6646(11)60037-5.J Formos Med Assoc. 2011.PMID: 21540007Free article.
Li CM, Chang CI, Yu WR, Yang W, Hsu CC, Chen CY.Li CM, et al. Among authors: chang ci.Arch Gerontol Geriatr. 2017 May-Jun;70:38-43. doi: 10.1016/j.archger.2016.12.009. Epub 2016 Dec 24.Arch Gerontol Geriatr. 2017.PMID: 28042985Clinical Trial.