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.
Mackenzie RL, Provan JL.Mackenzie RL, et al. Among authors: provan jl.Can Med Assoc J. 1974 Dec 7;111(11):1207-10.Can Med Assoc J. 1974.PMID: 4434289Free PMC article.
Ameli FM, Stein M, Provan JL, Aro L, Prosser R, St Louis EL.Ameli FM, et al. Among authors: provan jl.Can J Surg. 1989 Nov;32(6):428-32.Can J Surg. 1989.PMID: 2819620