| Literature DB >> 5541930 |
A Ebringer, A E Doyle, J K Dawborn, C I Johnston, M L Mashford.
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Year: 1971 PMID: 5541930 PMCID: PMC1794995 DOI: 10.1136/bmj.1.5745.402-c
Source DB: PubMed Journal: Br Med J ISSN: 0007-1447