TY - JOUR T1 - US, UK and Canada begin preparations for possible smallpox bioterror attacks JF - Canadian Medical Association Journal JO - CMAJ SP - 210 LP - 210-a VL - 168 IS - 2 AU - Cathel Kerr Y1 - 2003/01/21 UR - http://www.cmaj.ca/content/168/2/210.2.abstract ER -