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.
Rockley MG, Windsor MW, Cogdell RJ, Parson WW.Rockley MG, et al. Among authors: parson ww.Proc Natl Acad Sci U S A. 1975 Jun;72(6):2251-5. doi: 10.1073/pnas.72.6.2251.Proc Natl Acad Sci U S A. 1975.PMID: 1079602Free PMC article.
Campillo AJ, Hyer RC, Monger TG, Parson WW, Shapiro SL.Campillo AJ, et al. Among authors: parson ww.Proc Natl Acad Sci U S A. 1977 May;74(5):1997-2001. doi: 10.1073/pnas.74.5.1997.Proc Natl Acad Sci U S A. 1977.PMID: 16592397Free PMC article.