Objectives: To compare the efficacy and tolerability of formoterol (12 or 24µg twice daily) alone with combined ipratropium bromide and fenoterol in the treatment of chronic obstructive pulmonary ...

Clin Drug Invest. 2005;26(4):175-183. However, some caution must be taken when analyzing patient preference studies, as the outcome can often be affected by the design of the study. Various ...