[1] Northwestern Univ, Feinberg Sch Med, Ctr Cardiovasc Innovat, Chicago, IL 60611 USA
[2] Mayo Clin & Mayo Fdn, Div Cardiovasc Dis, Rochester, MN USA
[3] Med Univ Graz, Dept Cardiol, Graz, Austria
[4] Harvard Univ, Massachusetts Gen Hosp, Sch Med, Dept Med, Boston, MA USA
[5] Bayer Pharma AG, Berlin, Germany
[6] Bayer HealthCare, Cardiol Res, Wuppertal, Germany
[7] Brigham & Womens Hosp, Div Cardiovasc, Boston, MA 02115 USA
[8] Vrije Univ Amsterdam, Med Ctr Amsterdam, Dept Physiol, Inst Cardiovasc Res VU, Amsterdam, Netherlands
[9] Emory Univ, Sch Med, Div Cardiol, Atlanta, GA 30322 USA