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.
STARSurg Collaborative; Nepogodiev D.STARSurg Collaborative, et al.BMC Med Res Methodol. 2019 Dec 12;19(1):237. doi: 10.1186/s12874-019-0857-y.BMC Med Res Methodol. 2019.PMID: 31830925Free PMC article.
Kapp JM, Oliver DP, Simoes EJ.Kapp JM, et al.J Public Health Manag Pract. 2016 Sep-Oct;22(5):E21-8. doi: 10.1097/PHH.0000000000000383.J Public Health Manag Pract. 2016.PMID: 26910870
Simoes EJ, Kobau R, Kapp J, Waterman B, Mokdad A, Anderson L.Simoes EJ, et al.J Community Health. 2006 Dec;31(6):453-67. doi: 10.1007/s10900-006-9024-6.J Community Health. 2006.PMID: 17186640