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Llewellyn-Thomas HA, Sutherland HJ, Hogg SA, Ciampi A, Harwood AR, Keane TJ, Till JE, Boyd NF.Llewellyn-Thomas HA, et al. Among authors: boyd nf.J Chronic Dis. 1984;37(12):917-24. doi: 10.1016/0021-9681(84)90068-7.J Chronic Dis. 1984.PMID: 6084668