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Ramalli A, Boni E, Dallai A, Guidi F, Ricci S, Tortoli P.Ramalli A, et al. Among authors: boni e.IEEE Trans Ultrason Ferroelectr Freq Control. 2016 Nov;63(11):1815-1824. doi: 10.1109/TUFFC.2016.2573720. Epub 2016 May 26.IEEE Trans Ultrason Ferroelectr Freq Control. 2016.PMID: 27249828Free PMC article.