RT Journal Article SR Electronic T1 Adolescents and smoking: The first puff may be the worst JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 262 OP 262 DO 10.1503/cmaj.060737 VO 175 IS 3 A1 Jonathan D. Klein YR 2006 UL http://www.cmaj.ca/content/175/3/262.abstract