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Copley SJ, Coren M, Nicholson AG, Rubens MB, Bush A, Hansell DM.Copley SJ, et al.AJR Am J Roentgenol. 2000 Feb;174(2):549-54. doi: 10.2214/ajr.174.2.1740549.AJR Am J Roentgenol. 2000.PMID: 10658741
Sheehan RE, Wells AU, Copley SJ, Desai SR, Howling SJ, Cole PJ, Wilson R, Hansell DM.Sheehan RE, et al. Among authors: copley sj.Eur Respir J. 2002 Sep;20(3):581-7. doi: 10.1183/09031936.02.00284602.Eur Respir J. 2002.PMID: 12358332Free article.