RT Journal Article SR Electronic T1 Trends in bariatric surgery in Canada, 1993–2003 JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 735 OP 735 DO 10.1503/cmaj.045286 VO 172 IS 6 A1 Raj S. Padwal A1 Richard Z. Lewanczuk YR 2005 UL http://www.cmaj.ca/content/172/6/735.1.abstract