Donald E.G. Griesdale, Russell J. de Souza, Rob M. van Dam, Daren K. Heyland, Deborah J. Cook, Atul Malhotra, Rupinder Dhaliwal, William R. Henderson, Dean R. Chittock, Simon Finfer, Daniel Talmor
CMAJ. 2009 April 14; 180(8): 821–827. Published online 2008 March 24. doi: 10.1503/cmaj.090206