[1] Geisinger Med Ctr, Dept Cardiol, Danville, PA 17822 USA
[2] Prairie Cardiovasc Consultants, Springfield, IL USA
[3] Milton S Hershey Med Ctr, Dept Cardiol, Hershey, PA USA
[4] Metrohlth Med Ctr, Dept Cardiol, Cleveland, OH USA
[5] Mayo Clin, Dept Cardiol, Minneapolis, MN USA
[6] Cleveland Clin, Dept Cardiol, Cleveland, OH USA
[7] Baystate Med Ctr, Dept Cardiol, Springfield, MA USA
[8] Med Coll Virginia, Dept Cardiol, Richmond, VA USA
[9] Brigham & Womens Hosp, Dept Cardiol, Boston, MA USA