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.
Zhou Y, Lau EH, Ip DK, Nishiura H, Leung GM, Seto WH, Cowling BJ.Zhou Y, et al. Among authors: cowling bj.Am J Epidemiol. 2013 Oct 15;178(8):1313-8. doi: 10.1093/aje/kwt120. Epub 2013 Aug 26.Am J Epidemiol. 2013.PMID: 23978528Free PMC article.
Schooling CM, Lam TH, Li ZB, Ho SY, Chan WM, Ho KS, Tham MK, Cowling BJ, Leung GM.Schooling CM, et al. Among authors: cowling bj.Arch Intern Med. 2006 Jul 24;166(14):1498-504. doi: 10.1001/archinte.166.14.1498.Arch Intern Med. 2006.PMID: 16864760
Cowling BJ, Muller MP, Wong IO, Ho LM, Louie M, McGeer A, Leung GM.Cowling BJ, et al.Epidemiology. 2007 Mar;18(2):253-9. doi: 10.1097/01.ede.0000254660.07942.fb.Epidemiology. 2007.PMID: 17235210
Lam TH, Li ZB, Ho SY, Chan WM, Ho KS, Tham MK, Cowling BJ, Schooling CM, Leung GM.Lam TH, et al. Among authors: cowling bj.Tob Control. 2007 Jun;16(3):182-9. doi: 10.1136/tc.2006.019505.Tob Control. 2007.PMID: 17565138Free PMC article.