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.
Lee SS, Tam DK, Tan Y, Mak WL, Wong KH, Chen JH, Yam WC.Lee SS, et al. Among authors: chen jh.AIDS. 2009 Aug 24;23(13):1755-64. doi: 10.1097/QAD.0b013e32832dc025.AIDS. 2009.PMID: 19609202Free article.
Chen JH, Wong KH, Li PC, Chan KK, Lee MP, To SW, Yam WC.Chen JH, et al.Hong Kong Med J. 2012 Feb;18(1):20-4.Hong Kong Med J. 2012.PMID: 22302906Free article.