[1] Cleveland Clin Fdn, Heart Vasc & Thorac Inst, Dept Cardiovasc Med, Sect Clin Cardiol, Cleveland, OH USA
[2] Cleveland Clin Fdn, Heart Vasc & Thorac Inst, Dept Cardiovasc Med, Sect Electrophysiol, Cleveland, OH USA
[3] Cleveland Clin Fdn, Dept Cardiovasc Med, Sect Clin Cardiol, 9500 Euclid Ave, Cleveland, OH 44195 USA