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House AA, Eliasziw M, Cattran DC, Churchill DN, Oliver MJ, Fine A, Dresser GK, Spence JD.House AA, et al. Among authors: spence jd.JAMA. 2010 Apr 28;303(16):1603-9. doi: 10.1001/jama.2010.490.JAMA. 2010.PMID: 20424250Clinical Trial.
Krasinski A, Chiu B, Spence JD, Fenster A, Parraga G.Krasinski A, et al. Among authors: spence jd.Ultrasound Med Biol. 2009 Nov;35(11):1763-72. doi: 10.1016/j.ultrasmedbio.2009.05.017. Epub 2009 Aug 3.Ultrasound Med Biol. 2009.PMID: 19647921Clinical Trial.