RT Journal Article SR Electronic T1 Syria mission: safe is a relative term for Ottawa doctor JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP E453 OP E454 DO 10.1503/cmaj.109-4504 VO 185 IS 10 A1 Barbara Sibbald YR 2013 UL http://www.cmaj.ca/content/185/10/E453.abstract