TY - JOUR T1 - WHO mulls phase out of vaccine linked to polio outbreaks JF - Canadian Medical Association Journal JO - CMAJ SP - E1303 LP - E1304 DO - 10.1503/cmaj.109-4027 VL - 183 IS - 18 AU - Lauren Vogel Y1 - 2011/12/13 UR - http://www.cmaj.ca/content/183/18/E1303.abstract ER -