RT Journal Article SR Electronic T1 Physical Activity Line JF Canadian Family Physician JO Can Fam Physician FD The College of Family Physicians of Canada SP 967 OP 968 VO 59 IS 9 A1 Shannon S.D. Bredin A1 Darren E.R. Warburton YR 2013 UL http://www.cfp.ca/content/59/9/967.abstract AB