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Hubbard R, Venn A, Smith C, Cooper M, Johnston I, Britton J.Hubbard R, et al.Am J Respir Crit Care Med. 1998 Mar;157(3 Pt 1):743-7. doi: 10.1164/ajrccm.157.3.9701093.Am J Respir Crit Care Med. 1998.PMID: 9517585
Wong CA, Walsh LJ, Smith CJ, Wisniewski AF, Lewis SA, Hubbard R, Cawte S, Green DJ, Pringle M, Tattersfield AE.Wong CA, et al.Lancet. 2000 Apr 22;355(9213):1399-403. doi: 10.1016/S0140-6736(00)02138-3.Lancet. 2000.PMID: 10791523
Rowlands S, Devalia H, Smith C, Hubbard R, Dean A.Rowlands S, et al.Br J Gen Pract. 2001 Jul;51(468):533-8.Br J Gen Pract. 2001.PMID: 11462312Free PMC article.
McKeever TM, Lewis SA, Smith C, Collins J, Heatlie H, Frischer M, Hubbard R.McKeever TM, et al.Thorax. 2001 Oct;56(10):758-62. doi: 10.1136/thorax.56.10.758.Thorax. 2001.PMID: 11562513Free PMC article.