Rate this Article: A Randomized, Open-Label, Active-Controlled, Phase 3 Clinical Trial of FDC Erdosteine 300 mg and Acebrophylline 100 mg Tablet versus FDC Acebrophylline 100 mg and Acetylcysteine 600 mg Tablet in Treatment of Chronic Bronchitis in Participants with Chronic Obstructive Pulmonary Disease