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.
Pike M, Taylor J, Kabagambe E, Stewart TG, Robinson-Cohen C, Morse J, Akwo E, Abdel-Kader K, Siew ED, Blot WJ, Ikizler TA, Lipworth L.Pike M, et al.BMJ Open. 2019 Aug 30;9(8):e030661. doi: 10.1136/bmjopen-2019-030661.BMJ Open. 2019.PMID: 31471443Free PMC article.