 A COMPARISON OF SYMBICORT PMDI 2 X 1604.5 ΜG BID AND SYMBICORT PMDI 2 X 804.5 ΜG BID WITH FORMOTEROL TURBUHALER, BUDESONIDE PMDI, THE COMBINATION OF FORMOTEROL TURBUHALER AND BUDESONIDE PMDI, AND PLACEBO IN COPD PATIENTS: 