[1] Main Line Hlth, Lankenau Heart Inst, Lankenau Med Ctr, Dept Cardiothorac Surg, Wynnewood, PA USA
[2] Lankenau Inst Med Res, Dept Cardiothorac Surg Res, Wynnewood, PA USA
[3] Katholieke Univ Leuven, Dept Cardiovasc Sci, Leuven, Belgium
[4] Friedrich Schiller Univ Jena, Dept Cardiothorac Surg, Jena, Germany
[5] Leipzig Heart Ctr, Univ Dept Cardiac Surg, Leipzig, Germany
[6] Laval Univ, Univ Inst Cardiol & Pulmonol Quebec, Quebec City, PQ, Canada
[7] Main Line Hlth, Lankenau Inst Med Res, Lankenau Heart Inst, 100 East Lancaster Ave,Suite 215, Wynnewood, PA 19096 USA