RT Journal Article SR Electronic T1 Protecting Canadian travellers: Prevention is better than cure JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 373 OP 373 DO 10.1503/cmaj.080027 VO 178 IS 4 A1 Jay S. Keystone, MD MSc(CTM) YR 2008 UL http://www.cmaj.ca/content/178/4/373.abstract