4Du Toit JI.Inhaled Corticosteroids Reduce the Severity of Bronchial Hyperresponsiveness in Asthma but Oral Theophylline Ooes Not. The American Review of Respiratory Disease . 1987
5Van Essen-Zandvilet EE.Effects of 22 Months of Treatment with Inhaled Corticosteroids and/or Beta-2-Agonists on Lung Function.Airway Responsiveness. and symptons in children with Asthma. The American Review of Respiratory Disease . 1992
