
A phase III randomized controlled trial of tiotropium add-on therapy in children with severe symptomatic asthma
Keywords: جریان انقباض قله; Anticholinergic drug; asthma; asthma control; children; efficacy; FEV1; lung function; Respimat; safety; tiotropium; ACQ-IA; Interviewer-administered Asthma Control Questionnaire; FEF25-75; Forced expiratory flow at 25% to 75% of the forced vital capacity