The objective of this study is to evaluate the effect of the combination of formoterol and
beclometasone dipropionate on central and peripheral airway dimensions in asthmatic patients
using Computational Fluid Dynamics (CFD). Further more, the effect of this combination
therapy on exhaled NO, lung function (spirometry, body plethysmography, diffusion and
resistance) and subjective asthma control score as well as the safety of this combination
will be assessed.