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.
Haines A, Donald A.Haines A, et al. Among authors: donald a.BMJ. 1998 Jul 4;317(7150):72-5. doi: 10.1136/bmj.317.7150.72.BMJ. 1998.PMID: 9651281Free PMC article.Review.No abstract available.
Donald A, Muthu V.Donald A, et al.Clin Evid. 2002 Jun;(7):331-40.Clin Evid. 2002.Update in: Clin Evid. 2003 Jun;(9):396-406.PMID: 12230657Updated.Review.No abstract available.