PT - JOURNAL ARTICLE AU - Jonathan D. Klein TI - Adolescents and smoking: The first puff may be the worst AID - 10.1503/cmaj.060737 DP - 2006 Aug 01 TA - Canadian Medical Association Journal PG - 262--262 VI - 175 IP - 3 4099 - http://www.cmaj.ca/content/175/3/262.short 4100 - http://www.cmaj.ca/content/175/3/262.full SO - CMAJ2006 Aug 01; 175