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Custovic A, Simpson BM, Simpson A, Hallam CL, Marolia H, Walsh D, Campbell J, Woodcock A; National Asthma Campaign Manchester Asthma and Allergy Study Group.Custovic A, et al. Among authors: woodcock a.J Allergy Clin Immunol. 2003 Feb;111(2):402-7. doi: 10.1067/mai.2003.55.J Allergy Clin Immunol. 2003.PMID: 12589363