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.
Lai CK, Ho S, Chan CH, Chan J, Choy D, Leung R, Lai KN.Lai CK, et al. Among authors: chan ch, chan j.Chest. 1997 Mar;111(3):606-11. doi: 10.1378/chest.111.3.606.Chest. 1997.PMID: 9118695
Lai CK, Chan CH, Ho SS, Hui AC, Lai KN.Lai CK, et al. Among authors: chan ch.Chest. 1995 Jul;108(1):36-40. doi: 10.1378/chest.108.1.36.Chest. 1995.PMID: 7606988Clinical Trial.
Chan CH, Lai CK, Leung JC, Ho AS, Lai KN.Chan CH, et al.Eur Respir J. 1995 Jan;8(1):70-3. doi: 10.1183/09031936.95.08010070.Eur Respir J. 1995.PMID: 7744196Free article.