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.
Chen YC, Fang JT, Lin JD, Cherng WJ.Chen YC, et al. Among authors: fang jt.Chang Gung Med J. 2002 Nov;25(11):758-63.Chang Gung Med J. 2002.PMID: 12553364Free article.