we compared the protective effect and duration of action of inhaled formoterol , a new , long-acting , selective beta 2-agonist , to inhaled salbutamol and placebo in a double-blind , randomized , crossover study in 16 children with asthma with a mean age of 10.3 +/- 0.4 years .
C0001927
salbutamol
C0004096
asthma