| Literature DB >> 5539570 |
H M Foy, G E Kenny, R McMahan, G Kaiser, J T Grayston.
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Year: 1971 PMID: 5539570 DOI: 10.1093/oxfordjournals.aje.a121228
Source DB: PubMed Journal: Am J Epidemiol ISSN: 0002-9262 Impact factor: 4.897