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.
Rigotti NA, Singer DE, Mulley AG Jr, Thibault GE.Rigotti NA, et al.J Gen Intern Med. 1991 Jul-Aug;6(4):305-11. doi: 10.1007/BF02597426.J Gen Intern Med. 1991.PMID: 1890500
Thorndike AN, Rigotti NA, Stafford RS, Singer DE.Thorndike AN, et al. Among authors: rigotti na.JAMA. 1998 Feb 25;279(8):604-8. doi: 10.1001/jama.279.8.604.JAMA. 1998.PMID: 9486755