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4by Osman, L M, McKenzie, L, Cairns, J, Friend, J A R, Godden, D J, Legge, J S, Douglas, J GGet full text
Published in Thorax
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6by Mackenzie, A R, Laing, R B S, Douglas, J G, Greaves, M, Smith, C CGet full text
Published in Postgraduate medical journal
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18by Douglas, J G, Middleton, W G, Gaddie, J, Petrie, G R, Choo-Kang, Y F, Prescott, R J, Crompton, G KGet full text
Published in Thorax
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