The built environment and active transportation safety in children and youth: a study protocol oleh Brent E. Hagel, Alison Macpherson, Andrew Howard, Pamela Fuselli, Marie-Soleil Cloutier, Meghan Winters, Sarah A. Richmond, Linda Rothman, Kathy Belton, Ron Buliung, Carolyn A. Emery, Guy Faulkner, Jacqueline Kennedy, Tracey Ma, Colin Macarthur, Gavin R. McCormack, Greg Morrow, Alberto Nettel-Aguirre, Liz Owens, Ian Pike, Kelly Russell, Juan Torres, Donald Voaklander, Tania Embree, Tate Hubka