[1] Univ Vermont, Vermont Med Ctr, Coll Med, Cardiac Rehabil & Prevent Program, 62 Tilley Dr, Burlington, VT 05403 USA
[2] Henry Ford Hosp, Prevent Cardiol, Detroit, MI 48202 USA
[3] Ctr Dis Control & Prevent, Mill Hearts, Atlanta, GA USA
[4] George Washington Univ, Dept Exercise & Nutr Sci, Clin Exercise Physiol Program, Washington, DC USA
[5] GRQ LLC, Vienna, VA USA
[6] Sutter Roseville Med Ctr, Cardiac & Pulmonary Rehabil, Roseville, CA USA