RT Journal Article SR Electronic T1 Risk assessment for physical activity and exercise clearance JF Canadian Family Physician JO Can Fam Physician FD The College of Family Physicians of Canada SP 515 OP 517 VO 59 IS 5 A1 Bredin, Shannon S.D. A1 Foulds, Heather J.A. A1 Burr, Jamie F. A1 Charlesworth, Sarah A. YR 2013 UL http://www.cfp.ca/content/59/5/515.abstract AB