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Merckx KL, De Vos CB, Palmans A, Habets J, Cheriex EC, Crijns HJ, Tieleman RG.Merckx KL, et al. Among authors: cheriex ec.J Am Soc Echocardiogr. 2005 Sep;18(9):940-4. doi: 10.1016/j.echo.2005.03.022.J Am Soc Echocardiogr. 2005.PMID: 16153518Clinical Trial.