@article {pmid22992354,
	title = {Physical activity implementation in schools: a 4-year follow-up},
	journal = {Am J Prev Med},
	volume = {43},
	number = {4},
	year = {2012},
	month = {Oct},
	pages = {369{\textendash}377},
	author = {Masse, L. C. and McKay, H. and Valente, M. and Brant, R. and Naylor, P. J.}
}
