[1] Univ Calgary, Fac Kinesiol, Sport Injury Prevent Res Ctr, Calgary, AB T2N 1N4, Canada
[2] Univ Calgary, Alberta Childrens Hosp, Res Inst, Calgary, AB T2N 1N4, Canada
[3] Univ Calgary, Hotchkiss Brain Inst, Calgary, AB T2N 4N1, Canada
[4] Univ Calgary, OBrien Inst Publ Hlth, Calgary, AB T2N 4Z6, Canada
[5] Univ Calgary, Fac Kinesiol, Calgary, AB T2N 1N4, Canada
[6] Univ Calgary, Sch Architecture Planning & Design, Calgary, AB T2N 1N4, Canada
[7] Univ Alberta, Sch Publ Hlth, Injury Prevent Ctr, Edmonton, AB T6G 2E1, Canada
[8] BC Childrens Hosp, BC Injury Res & Prevent Unit, Vancouver, BC V6H 3V4, Canada
[9] Univ British Columbia, Dept Pediat, Vancouver, BC V6T 1Z4, Canada
[10] Univ Calgary, Werklund Sch Educ, Calgary, AB T2N 1N4, Canada
[11] Univ Edinburgh, Sch Hlth Social Sci, Clin Psychol, Edinburgh EH8 9AG, Midlothian, Scotland
[12] Univ Edinburgh, Moray House Sch Educ & Sport, Inst Sport Phys Educ & Hlth Sci, Edinburgh EH8 8QA, Midlothian, Scotland
[13] Univ Calgary, Dept Psychol, Calgary, AB T2N 1N4, Canada
[14] Univ Calgary, Cumming Sch Med, Calgary, AB T2N 4N1, Canada
[15] Univ Calgary, Dept Psychiat, Calgary, AB T2N 4N1, Canada
[16] Univ Calgary, Mathison Ctr Mental Hlth Res & Educ, Calgary, AB T2N 4Z6, Canada
[17] Univ Calgary, Fac Kinesiol, Sport Med Ctr, Calgary, AB T2N 1N4, Canada
[18] Parachute, Toronto, ON M4P 1E8, Canada