TY - JOUR T1 - Second-hand smoke in cars: How did the “23 times more toxic” myth turn into fact? JF - Canadian Medical Association Journal JO - CMAJ SP - 796 LP - 799 DO - 10.1503/cmaj.090993 VL - 182 IS - 8 AU - Ross MacKenzie AU - Becky Freeman Y1 - 2010/05/18 UR - http://www.cmaj.ca/content/182/8/796.abstract ER -