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Pichardo S, Sin VW, Hynynen K.Pichardo S, et al.Phys Med Biol. 2011 Jan 7;56(1):219-50. doi: 10.1088/0031-9155/56/1/014. Epub 2010 Dec 9.Phys Med Biol. 2011.PMID: 21149950Free PMC article.
Pichardo S, Togtema M, Jackson R, Zehbe I, Curiel L.Pichardo S, et al.IEEE Trans Ultrason Ferroelectr Freq Control. 2013 Feb;60(2):432-5. doi: 10.1109/TUFFC.2013.2581.IEEE Trans Ultrason Ferroelectr Freq Control. 2013.PMID: 23357919