A 52-WEEK, DOUBLE BLIND, DOUBLE DUMMY, RANDOMIZED, 3-ARM PARALLEL GROUP, ACTIVE CONTROLLED CLINICAL TRIAL OF FIXED COMBINATION OF BECLOMETASONE DIPROPIONATE PLUS FORMOTEROL FUMARATE PLUS GLYCOPYRROLATE BROMIDE ADMINISTERED VIA PMDI (CHF 5993) VERSUS TIOTROPIUM BROMIDE AND VERSUS FIXED COMBINATION OF BECLOMETASONE DIPROPIONATE PLUS FORMOTEROL FUMARATE ADMINISTERED VIA PMDI AND TIOTROPIUM BROMIDE IN PATIENTS WITH CHRONIC OBSTRUCTIVE PULMONARY DISEASE