TY - JOUR T1 - Roadblocks to laws for healthy eating and activity JF - Canadian Medical Association Journal JO - CMAJ SP - 687 LP - 692 DO - 10.1503/cmaj.091403 VL - 182 IS - 7 AU - Nola M. Ries AU - Barbara von Tigerstrom Y1 - 2010/04/20 UR - http://www.cmaj.ca/content/182/7/687.abstract ER -