| Literature DB >> 9616431 |
T Jefferson1, V Demicheli, M Pratt.
Abstract
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Year: 1998 PMID: 9616431 PMCID: PMC1756690 DOI: 10.1136/jech.52.3.207
Source DB: PubMed Journal: J Epidemiol Community Health ISSN: 0143-005X Impact factor: 3.710