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.
Lopez SV, Krems JA, Dunn DS, Warner E, Leffingwell TR.Lopez SV, et al. Among authors: leffingwell tr.J Am Coll Health. 2023 Aug-Sep;71(6):1670-1675. doi: 10.1080/07448481.2021.1947836. Epub 2021 Jul 9.J Am Coll Health. 2023.PMID: 34242137
Brett EI, Leavens EL, Miller MB, Lombardi N, Leffingwell TR.Brett EI, et al. Among authors: leffingwell tr.Addict Behav. 2016 Jul;58:16-20. doi: 10.1016/j.addbeh.2016.02.008. Epub 2016 Feb 10.Addict Behav. 2016.PMID: 26896561