[1] Univ Alabama, Birmingham, AL 35294 USA
[2] Univ Pittsburgh, Med Ctr, Presbyterian Univ Hosp, Pittsburgh, PA USA
[3] Brigham & Womens Hosp, Div Cardiovasc, Boston, MA 02115 USA
[4] Univ Michigan, Ann Arbor, MI 48109 USA
[5] NHLBI, Rockledge Ctr 2, Bethesda, MD 20892 USA
[6] NIH, NHLBI, Div Cardiovasc Dis, Adv Technol & Surg Branch, Rockledge, IL USA
[7] NIH, NHLBI, Div Cardiovasc Dis, Adv Technol & Surg Branch, Bethesda, MD 20892 USA
[8] Cleveland Clin Fdn, Lerner Coll Med, Cleveland, OH 44195 USA