[1] Univ Pittsburgh, Sch Med, Dept Med, Div Cardiol, Pittsburgh, PA 15261 USA
[2] Univ Pittsburgh, Med Ctr, Pittsburgh, PA 15261 USA
[3] Univ Pittsburgh, Sch Med, Dept Med, Pittsburgh, PA 15261 USA
[4] Univ Pittsburgh, Sch Med, Inst Heart & Vasc, Ctr Ultrasound Mol Imaging & Therapeut, Pittsburgh, PA 15261 USA
[5] Sonex Hlth Inc, Eagan, MN 55121 USA
[6] Univ Pittsburgh, Sch Engn, Dept Bioengn, Pittsburgh, PA 15261 USA
[7] Univ Pittsburgh, Sch Engn, Dept Mech Engn & Mat Sci, Pittsburgh, PA 15261 USA
[8] Univ Pittsburgh, McGowan Inst Regenerat Med, Pittsburgh, PA 15219 USA
[9] Univ Pittsburgh, Med Ctr, Pittsburgh, PA 15219 USA