[1] Mayo Clin, Dept Cardiovasc Dis, Jacksonville, FL USA
[2] Morristown Med Ctr, Dept Cardiovasc Med, Atlantic Hlth, Morristown, NJ USA
[3] Morristown Med Ctr, Sports Cardiol & Hypertroph Cardiomyopathy, Morristown, NJ USA
[4] Cleveland Clin, Heart Vasc & Thorac Inst, Sports Cardiol Ctr, Dept Cardiovasc Med, Cleveland, OH 44195 USA
[5] Cleveland Clin, Sydell & Arnold Family Heart Vasc & Thorac Inst, Dept Cardiovasc Med, Sect Clin Cardiol, 9500 Euclid Ave,Desk J2-4, Cleveland, OH 44195 USA