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Heart. 2004 Aug;90(8):956-60.

Interpretation of observational studies.

Author information

1
Department of Clinical Epidemiology, Aarhus University Hospital, Vennelyst Boulevard 6, 8000 Aarhus C, Denmark. pj@soci.au.dk
PMID:
15253985
PMCID:
PMC1768356
DOI:
10.1136/hrt.2003.017269
[Indexed for MEDLINE]
Free PMC Article

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