PT - JOURNAL ARTICLE AU - John C. LeBlanc TI - Butting heads over bicycle helmets DP - 2002 Aug 20 TA - Canadian Medical Association Journal PG - 338--339 VI - 167 IP - 4 4099 - http://www.cmaj.ca/content/167/4/338.short 4100 - http://www.cmaj.ca/content/167/4/338.full SO - CMAJ2002 Aug 20; 167