[1] Columbia Univ, Ctr Adv Cardiac Care, Irving Med Ctr, Div Cardiol, New York, NY USA
[2] Univ Penn, Perelman Sch Med, Div Cardiovasc Med, 3400 Civ Ctr Blvd,11 South Tower, Philadelphia, PA 19104 USA
[3] Brigham & Womens Hosp, Dept Med, Boston, MA USA
[4] Ascens St Thomas Heart, Nashville, TN USA
[5] Weill Cornell Med Coll, New York, NY USA
[6] Cornell Univ, New York, NY USA
[7] Howard Univ, Dept Med, Washington, DC USA
[8] Duke Univ, Med Ctr, Dept Med, Div Cardiol, Durham, NC USA
[9] Univ Penn, Perelman Sch Med, Dept Gastroenterol, Philadelphia, PA USA