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.
Poulos A, McLean D, Rickard M, Heard R.Poulos A, et al. Among authors: heard r.Australas Radiol. 2003 Jun;47(2):121-6. doi: 10.1046/j.0004-8461.2003.01139.x.Australas Radiol. 2003.PMID: 12780439
Al Mousa DS, Mello-Thoms C, Ryan EA, Lee WB, Pietrzyk MW, Reed WM, Heard R, Poulos A, Tan J, Li Y, Brennan PC.Al Mousa DS, et al. Among authors: heard r.Acad Radiol. 2014 Nov;21(11):1377-85. doi: 10.1016/j.acra.2014.06.004. Epub 2014 Aug 2.Acad Radiol. 2014.PMID: 25097013
Tavakoli Taba S, Hossain L, Heard R, Brennan P, Lee W, Lewis S.Tavakoli Taba S, et al. Among authors: heard r.PLoS One. 2016 Feb 26;11(2):e0150186. doi: 10.1371/journal.pone.0150186. eCollection 2016.PLoS One. 2016.PMID: 26918644Free PMC article.