Comparisons: beclomethasone dipropionate 250 mg combined with salbutamol 100 mg “as needed”, vs salbutamol 100 mg alone “as needed”, vs beclomethasone 250 mg twice a day plus salbutamol 100 mg “as needed” and vs beclomethasone dipropionate 250 mg combined with salbutamol 100 mg twice a day plus salbutamol 100 mg “as needed”, in the treatment of patients with mild persistent asthma.