RT Journal Article SR Electronic T1 Restricted access for PPIs not a panacea JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP 1102 OP 1104 VO 167 IS 10 A1 John K. Marshall A1 Paul Grootendorst A1 Anne M. Holbrook YR 2002 UL http://www.cmaj.ca/content/167/10/1102.2.abstract