The interpretation of epidemiologic studies
- PMID: 2392134
- DOI: 10.1056/NEJM199009203231209
The interpretation of epidemiologic studies
Comment on
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Exposure of children with cystic fibrosis to environmental tobacco smoke.N Engl J Med. 1990 Sep 20;323(12):782-8. doi: 10.1056/NEJM199009203231203. N Engl J Med. 1990. PMID: 2392132
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