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Stenton SC, Court EN, Kingston WP, Goadby P, Kelly CA, Duddridge M, Ward C, Hendrick DJ, Walters EH.Stenton SC, et al. Among authors: ward c.Eur Respir J. 1990 Apr;3(4):408-13.Eur Respir J. 1990.PMID: 2365035
Duddridge M, Kelly CA, Ward C, Hendrick DJ, Walters EH.Duddridge M, et al. Among authors: ward c.Eur Respir J. 1990 Nov;3(10):1166-72.Eur Respir J. 1990.PMID: 2090479
Kelly CA, Ward C, Stenton SC, Hendrick DJ, Walters EH.Kelly CA, et al. Among authors: ward c.Thorax. 1988 Oct;43(10):787-91. doi: 10.1136/thx.43.10.787.Thorax. 1988.PMID: 3206387Free PMC article.
Kelly CA, Kotre CJ, Ward C, Hendrick DJ, Walters EH.Kelly CA, et al. Among authors: ward c.Thorax. 1987 Aug;42(8):624-8. doi: 10.1136/thx.42.8.624.Thorax. 1987.PMID: 3310313Free PMC article.