TY - JOUR T1 - Smoking status and planned hospital births JF - Canadian Medical Association Journal JO - CMAJ SP - 716 LP - 716 DO - 10.1503/cmaj.109-2034 VL - 181 IS - 10 AU - Enrique F. Barros Y1 - 2009/11/10 UR - http://www.cmaj.ca/content/181/10/716.1.abstract ER -