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.
Preston SJ, Arnold MH, Buchanan WW.Preston SJ, et al. Among authors: buchanan ww.Aust N Z J Ophthalmol. 1989 May;17(2):111-20. doi: 10.1111/j.1442-9071.1989.tb00498.x.Aust N Z J Ophthalmol. 1989.PMID: 2667578Review.
Brooks PM, Mason DI, McNeil R, Anderson JA, Buchanan WW.Brooks PM, et al. Among authors: buchanan ww.Curr Med Res Opin. 1976;4(1):50-6. doi: 10.1185/03007997609109281.Curr Med Res Opin. 1976.PMID: 770080Clinical Trial.