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.
Bollinger CR, van Hasselt M.Bollinger CR, et al. Among authors: van hasselt m.Econ Lett. 2020 Dec;197:109652. doi: 10.1016/j.econlet.2020.109652. Epub 2020 Nov 2.Econ Lett. 2020.PMID: 33162626Free PMC article.
van Hasselt M, Weiss M, Haase W.van Hasselt M, et al.Curr Med Res Opin. 1984;9(2):107-12. doi: 10.1185/03007998409109567.Curr Med Res Opin. 1984.PMID: 6443348Clinical Trial.