[1] HARVARD UNIV, BRIGHAM & WOMENS HOSP, SCH MED, DEPT CARDIOTHORAC SURG, BOSTON, MA 02115 USA
[2] HARVARD UNIV, BRIGHAM & WOMENS HOSP, SCH MED, DEPT CARDIOL, BOSTON, MA 02115 USA
[3] HARVARD UNIV, BRIGHAM & WOMENS HOSP, SCH MED, DEPT PATHOL, BOSTON, MA 02115 USA