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.
Bradford WD, Dolan P.Bradford WD, et al.J Health Econ. 2010 Dec;29(6):811-20. doi: 10.1016/j.jhealeco.2010.07.007. Epub 2010 Aug 3.J Health Econ. 2010.PMID: 20728231
Dalton CM, Bradford WD.Dalton CM, et al. Among authors: bradford wd.J Health Econ. 2019 Jan;63:1-18. doi: 10.1016/j.jhealeco.2018.10.001. Epub 2018 Oct 11.J Health Econ. 2019.PMID: 30439574