at mean ( sd ) serum theophylline concentrations of 6.7 ( 1.3 ) , 10.1 ( 1.7 ) , and 6.3 ( 1.4 ) mg/l , respectively , te200 , te351 , and tpd for specific airway resistance caused a significant bronchodilation ( p less than 0.05 ) and resulted in mean ( sd ) protection indices of 0.61 ( 0.15 ) , 0.82 ( 0.14 ) , and 0.65 ( 0.20 ) , respectively , being significantly different from 0 ( p less than 0.01 ) .
C0039771
theophylline
C1371299
bronchodilation