Cheung Christopher, Merkeley Hayley, Srigley Jocelyn A, Salh Baljinder, Webber Douglas, Voyer Stephane
Department of Medicine, University of British Columbia, Vancouver, BC, Canada.
CMAJ. 2012 Nov 6;184(16):1808-10. doi: 10.1503/cmaj.120714. Epub 2012 Aug 7.