| Literature DB >> 4982411 |
D W Johnson, K K Holmes, P A Kvale, C W Halverson, W P Hirsch.
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Year: 1969 PMID: 4982411 DOI: 10.1093/oxfordjournals.aje.a121090
Source DB: PubMed Journal: Am J Epidemiol ISSN: 0002-9262 Impact factor: 4.897