title: A 'knock on the noggin'.
authors.affiliation: Dalhousie University, Halifax, Nova Scotia;
authors.forename: Kevin
authors.initials: K
authors.lastname: Gordon
authors.affiliation: Injury Section, Health Surveillance and Epidemiology Division, Centre for Chronic Disease Prevention and Control, Public Health Agency of Canada, Ottawa, Ontario.
authors.forename: Minh T
authors.initials: MT
authors.lastname: Do
authors.affiliation: Injury Section, Health Surveillance and Epidemiology Division, Centre for Chronic Disease Prevention and Control, Public Health Agency of Canada, Ottawa, Ontario.
authors.forename: Wendy
authors.initials: W
authors.lastname: Thompson
authors.affiliation: Injury Section, Health Surveillance and Epidemiology Division, Centre for Chronic Disease Prevention and Control, Public Health Agency of Canada, Ottawa, Ontario.
authors.forename: Steven
authors.initials: S
authors.lastname: McFaull
authors.affiliation: Dalhousie University, Halifax, Nova Scotia;
authors.forename: Brett
authors.initials: B
authors.lastname: Taylor