RT Journal Article SR Electronic T1 The effect of privacy legislation on observational research JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 871 OP 873 DO 10.1503/cmaj.061353 VO 178 IS 7 A1 Andrea S. Gershon, MD MSc A1 Jack V. Tu, MD PhD YR 2008 UL http://www.cmaj.ca/content/178/7/871.abstract