RT Journal Article SR Electronic T1 Hand hygiene and virus transmission JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 716 OP 716-b DO 10.1503/cmaj.109-2031 VO 181 IS 10 A1 Benjamin J. Cowling A1 Gabriel M. Leung A1 Wing-Hong Seto YR 2009 UL http://www.cmaj.ca/content/181/10/716.3.abstract