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Greenhalgh RM, Illingworth RD, McFie J, Mills SP, Perkin GD, Rose FC.Greenhalgh RM, et al. Among authors: illingworth rd.Br Med J. 1979 Jul 7;2(6181):18-9. doi: 10.1136/bmj.2.6181.18.Br Med J. 1979.PMID: 466251Free PMC article.No abstract available.