TY - JOUR T1 - Benzene rings JF - Canadian Medical Association Journal JO - CMAJ SP - 345 LP - 345-a DO - 10.1503/cmaj.1050165 VL - 173 IS - 4 AU - David Maxwell Y1 - 2005/08/16 UR - http://www.cmaj.ca/content/173/4/345.2.abstract ER -