![Comparison of Ipratropium Bromide and Albuterol Sulfate Chlorofluorocarbon Metered-Dose Inhaler and Albuterol Hydrofluoroalkane Metered-Dose Inhaler in a Crossover Trial in Patients with Moderate-to-Severe Asthma]()
Comparison of Ipratropium Bromide and Albuterol Sulfate Chlorofluorocarbon Metered-Dose Inhaler and Albuterol Hydrofluoroalkane Metered-Dose Inhaler in a Crossover Trial in Patients with Moderate-to-Severe AsthmaBleecker, E.R.; Busse, W.W.; Donohue, J.F.; Garfinkel, S.; Lystig, T.; Manuel, R.C.; Schlenker-Herceg, R.; Wise, R.A. · Journal of Allergy and Clinical Immunology · 2011