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Tiotropium or salmeterol as add-on therapy to inhaled corticosteroids for patients with moderate symptomatic asthma: two replicate, double-blind, placebo-controlled, parallel-group, active-comparator, randomised trials

AsthmaModerate Symptomatic AsthmaAllergyRandomised TrialsClinical TrialsPulmonary PharmacologyPharmacotherapyAllergic RhinitisMedicineAnesthesiologyAdd-on Therapy