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Pharmacoepidemiol Drug Saf. 2007 Aug;16(8):850-3.

'Why me?' versus 'why now?'--differences between operational hypotheses in case-control versus case-crossover studies.

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  • School of Health Information Science, University of Victoria, Victoria, British Columbia, Canada. malcolmmaclure@shaw.ca

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PMID:
17636552
[PubMed - indexed for MEDLINE]
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