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CMAJ. 2010 Oct 19;182(15):1638-42. doi: 10.1503/cmaj.092252. Epub 2010 Jul 19.

Registration of observational studies: is it time?

Author information

  • 1National Library of Medicine, National Institutes of Health, UnitedStates Department of Health and Human Services, Bethesda, USA. williamsre@mail.nih.gov
PMID:
20643833
[PubMed - indexed for MEDLINE]
PMCID:
PMC2952011
Free PMC Article
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