RT Journal Article SR Electronic T1 Is early, low level, short term exercise cardiac rehabilitation following coronary bypass surgery beneficial? A randomised controlled trial JF Heart JO Heart FD BMJ Publishing Group Ltd and British Cardiovascular Society SP 83 OP 84 DO 10.1136/heart.88.1.83 VO 88 IS 1 A1 D J Wright A1 S G Williams A1 R Riley A1 P Marshall A1 L B Tan YR 2002 UL http://heart.bmj.com/content/88/1/83.abstract AB