Shaw, Neal H Bodychecking in hockey. [electronic resource] - CMAJ : Canadian Medical Association journal = journal de l'Association medicale canadienne Jan 2004 - 15-6; author reply 16, 18 p. digital Publication Type: Comment; Letter ISSN: 0820-3946 Subjects--Topical Terms: AdolescentBrain Concussion--epidemiologyCanada--epidemiologyChildCumulative Trauma Disorders--epidemiologyHockey--injuriesHumansRisk FactorsViolence--statistics & numerical data