[1] Univ Maryland, Sch Med, Div Cardiac Surg, Baltimore, MD 21201 USA
[2] Univ Maryland, Sch Med, Dept Med, Baltimore, MD 21201 USA
[3] Univ Maryland, Med Ctr, Dept Clin Engn, Baltimore, MD 21201 USA
[4] NYU, Langone Med Ctr, Dept Cardiothorac Surg, New York, NY USA