RT Journal Article SR Electronic T1 The eco–biological–behavioural perfect storm that follows heavy snowfall JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP E225 OP E226 DO 10.1503/cmaj.170022 VO 189 IS 6 A1 David A. Alter YR 2017 UL http://www.cmaj.ca/content/189/6/E225.abstract AB