Exercise training in older patients with heart failure and preserved ejection fraction: a randomized, controlled, single-blind trial.
Kitzman DW, Brubaker PH, Morgan TM, Stewart KP, Little WC. Exercise training in older patients with heart failure and preserved ejection fraction: a randomized, controlled, single-blind trial. Circ Heart Fail. 2010 Nov; 3(6):659-67.