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Kleinschmidt I, Churchyard G.Kleinschmidt I, et al.Occup Environ Med. 1997 Sep;54(9):636-41. doi: 10.1136/oem.54.9.636.Occup Environ Med. 1997.PMID: 9423575Free PMC article.
Corbett EL, Churchyard GJ, Clayton T, Herselman P, Williams B, Hayes R, Mulder D, De Cock KM.Corbett EL, et al. Among authors: churchyard gj.Am J Respir Crit Care Med. 1999 Jan;159(1):94-9. doi: 10.1164/ajrccm.159.1.9803048.Am J Respir Crit Care Med. 1999.PMID: 9872824
Corbett EL, Churchyard GJ, Hay M, Herselman P, Clayton T, Williams B, Hayes R, Mulder D, De Cock KM.Corbett EL, et al. Among authors: churchyard gj.Am J Respir Crit Care Med. 1999 Jul;160(1):10-4. doi: 10.1164/ajrccm.160.1.9808052.Am J Respir Crit Care Med. 1999.PMID: 10390373
Corbett EL, Mallory KF, Grant AD, Churchyard GJ, De Cock KM.Corbett EL, et al. Among authors: churchyard gj.Lancet. 2001 Mar 24;357(9260):957-8. doi: 10.1016/S0140-6736(05)71656-1.Lancet. 2001.PMID: 11289372No abstract available.