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.
Arevalo-Rodriguez I, Steingart KR, Tricco AC, Nussbaumer-Streit B, Kaunelis D, Alonso-Coello P, Baxter S, Bossuyt PM, Emparanza JI, Zamora J.Arevalo-Rodriguez I, et al.BMC Med Res Methodol. 2020 May 13;20(1):115. doi: 10.1186/s12874-020-01004-z.BMC Med Res Methodol. 2020.PMID: 32404051Free PMC article.
Wagner G, Nussbaumer-Streit B, Greimel J, Ciapponi A, Gartlehner G.Wagner G, et al.BMC Med Res Methodol. 2017 Aug 14;17(1):121. doi: 10.1186/s12874-017-0406-5.BMC Med Res Methodol. 2017.PMID: 28806999Free PMC article.
Mahmić-Kaknjo M, Tomić V, Ellen ME, Nussbaumer-Streit B, Sfetcu R, Baladia E, Riva N, Kassianos AP, Marušić A.Mahmić-Kaknjo M, et al.Syst Rev. 2023 Mar 28;12(1):56. doi: 10.1186/s13643-023-02223-3.Syst Rev. 2023.PMID: 36973729Free PMC article.