[1] McMaster Univ, Sch Nursing, 1280 Main St W, Hamilton, ON, Canada
[2] Univ Western Ontario, Arthur Labatt Family Sch Nursing, London, ON, Canada
[3] Univ Western Ontario, Fac Informat & Media Studies, London, ON, Canada
[4] W Virginia Univ, Dept Emergency Med, Morgantown, WV 26506 USA
[5] Rush Univ, Coll Nursing, Chicago, IL 60612 USA
[6] W Virginia Univ, Dept Community Med, Morgantown, WV 26506 USA
[7] Univ Colorado, Prevent Res Ctr Family & Child Hlth, Denver, CO 80202 USA
[8] McMaster Univ, Offord Ctr Child Studies, Hamilton, ON, Canada
[9] W Virginia Univ, Injury Control Res Ctr, Morgantown, WV 26506 USA