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Choi JJ, Wang S, Tung YS, Morrison B 3rd, Konofagou EE.Choi JJ, et al. Among authors: tung ys.Ultrasound Med Biol. 2010 Jan;36(1):58-67. doi: 10.1016/j.ultrasmedbio.2009.08.006.Ultrasound Med Biol. 2010.PMID: 19900750Free PMC article.