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Lawton JW, Hopkins R, Kay AB, Das PC, Paterson IC, Grant IW.Lawton JW, et al. Among authors: hopkins r.Lancet. 1975 Feb 1;1(7901):280-1. doi: 10.1016/s0140-6736(75)91185-x.Lancet. 1975.PMID: 46427No abstract available.