[1] Columbia Univ, Cardiovasc Res Fdn, New York, NY USA
[2] Providence Hlth Syst, Vancouver, BC, Canada
[3] Mayo Clin, Rochester, MN USA
[4] Cleveland Clin, Cleveland, OH 44106 USA
[5] MedStar Washington Hosp Ctr, Washington, DC USA
[6] St Lukes Mid Amer Heart Inst, Kansas City, MO USA
[7] Emory Univ, Atlanta, GA 30322 USA
[8] Baylor Healthcare Syst, Plano, TX USA
[9] Columbia Univ, Med Ctr, New York, NY USA