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Shahid SK, Kharitonov SA, Wilson NM, Bush A, Barnes PJ.Shahid SK, et al. Among authors: barnes pj.Am J Respir Crit Care Med. 2002 May 1;165(9):1290-3. doi: 10.1164/rccm.2108082.Am J Respir Crit Care Med. 2002.PMID: 11991881
Bush A, Busst CM, Clarke B, Barnes PJ.Bush A, et al. Among authors: barnes pj.Br J Clin Pharmacol. 1989 Feb;27(2):165-71. doi: 10.1111/j.1365-2125.1989.tb05347.x.Br J Clin Pharmacol. 1989.PMID: 2713212Free PMC article.Clinical Trial.