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LLOYD-THOMAS HG, BALME RH, KEY JJ.LLOYD-THOMAS HG, et al. Among authors: key jj.Br Med J. 1962 Mar 31;1(5282):909-11. doi: 10.1136/bmj.1.5282.909.Br Med J. 1962.PMID: 14466063Free PMC article.No abstract available.