| Literature DB >> 793676 |
R M Graham, I R Thornell, J M Gain, C Bagnoli, H F Oates, G S Stokes.
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Year: 1976 PMID: 793676 PMCID: PMC1689975 DOI: 10.1136/bmj.2.6047.1293
Source DB: PubMed Journal: Br Med J ISSN: 0007-1447