TY - JOUR T1 - Ontario immunization rate for polio JF - Canadian Medical Association Journal JO - CMAJ SP - 1331 LP - 1332 DO - 10.1503/cmaj.110-2094 VL - 182 IS - 12 AU - Arlene King Y1 - 2010/09/07 UR - http://www.cmaj.ca/content/182/12/1331.3.abstract ER -