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.
Imrie K, Esmail R, Meyer RM; Members of the Hematology Disease Site Group of the Cancer Care Ontario Practice Guidelines Initiative.Imrie K, et al. Among authors: esmail r.Ann Intern Med. 2002 Apr 16;136(8):619-29. doi: 10.7326/0003-4819-136-8-200204160-00012.Ann Intern Med. 2002.PMID: 11955031Free article.
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.