RT Journal Article SR Electronic T1 Avian flu: WHO prepares for the worst JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 777 OP 777-a DO 10.1503/cmaj.1040211 VO 170 IS 5 A1 Margot Andresen YR 2004 UL http://www.cmaj.ca/content/170/5/777.2.abstract