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Lung function measurements during long-term follow-up of elastase-treated mice (n = 30 for 21 days. n = 5 for 5 and 10 months) and saline controls (n = 25 for 21 days. n = 5 for 5 and 10 months). Data are expressed as mean ± SEM. * = p < 0.05. ** = p < 0.01.
