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8by Somerville, Kevin W., Logan, Richard F. A., Edmond, Margaret, Langman, Michael J. S.Get full text
Published in BMJ
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15by Logan, Richard F. A., Edmond, Margaret, Somerville, Kevin W., Langman, Michael J. S.Get full text
Published in BMJ
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18by Elwood, J M, Pearson, J C, Madeley, R J, Logan, R F, Beaver, M W, Gillies, P A, Little, J, Langham, AGet full text
Published in Journal of epidemiology and community health (1979)
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