[1] Mayo Clin, Dept Cardiovasc Med, 200 First St SW, Rochester, MN 55905 USA
[2] Vanderbilt Univ, Med Ctr, Div Cardiovasc Med, Nashville, TN USA
[3] Univ Virginia, Div Cardiovasc Med, Charlottesville, VA USA
[4] Univ Vermont, Larner Coll Med, Div Cardiol, Burlington, VT USA
[5] Charles Drew Univ, Dept Med, Loma Linda Vet Healthcare, Loma Linda, CA USA
[6] Univ Calif Los Angeles, Dept Med, Div Cardiol, Los Angeles, CA USA
[7] Case Western Reserve Univ, Metrohlth Med Ctr, Sch Med, Cleveland, OH USA
[8] Accreditat Council Grad Med Educ, Chicago, IL USA
[9] Univ North Carolina, Sch Med, Div Cardiovasc Med, Chapel Hill, NC USA
[10] Amer Coll Cardiol, Washington, DC USA
[11] Medstar Heart & Vasc Inst, Dept Cardiol, Washington, DC USA
[12] Georgetown Univ, Washington, DC USA