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.
Ho SC, Woo J, Lau J, Chan SG, Yuen YK, Chan YK, Chi I.Ho SC, et al.J Am Geriatr Soc. 1995 Mar;43(3):252-5. doi: 10.1111/j.1532-5415.1995.tb07331.x.J Am Geriatr Soc. 1995.PMID: 7884112
Woo J, Ho SC, Lau J, Yuen YK.Woo J, et al.J Epidemiol Community Health. 1994 Jun;48(3):306-9. doi: 10.1136/jech.48.3.306.J Epidemiol Community Health. 1994.PMID: 8051532Free PMC article.
Lai CK, Ho SC, Lau J, Yuen YK, Ho SS, Chan CH, Woo J.Lai CK, et al.Eur Respir J. 1995 Dec;8(12):2055-61. doi: 10.1183/09031936.95.08122055.Eur Respir J. 1995.PMID: 8666100Free article.