| Literature DB >> 5723393 |
T P McKelvey, A R Lundie, E D Williams, H S Moore, D E Worsley.
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Year: 1968 PMID: 5723393 PMCID: PMC1912814 DOI: 10.1136/bmj.4.5632.703-a
Source DB: PubMed Journal: Br Med J ISSN: 0007-1447