RT Journal Article SR Electronic T1 Rigorous policies ensure integrity of NLM literature databases JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP E289 OP E289 DO 10.1503/cmaj.71602 VO 191 IS 10 A1 Topper, Lauren A1 Marill, Jennifer A1 Kelly, Christopher A1 Funk, Kathryn YR 2019 UL http://www.cmaj.ca/content/191/10/E289.abstract