RT Journal Article SR Electronic T1 Active play key to curbing child obesity JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP E269 OP E270 DO 10.1503/cmaj.109-5058 VO 187 IS 9 A1 Lauren Vogel YR 2015 UL http://www.cmaj.ca/content/187/9/E269.abstract