A Multi-centre Randomized Double Blind 52-week Study to Assess the Safety of QVA149 Compared to QAB149 in Patients With COPD Who Have Moderate to Severe Airflow Limitation
Conditions
- Chronic Obstructive Pulmonary Disease (COPD)
Interventions
- DRUG: QVA149
- DRUG: QVA149
- DRUG: QAB149
- DRUG: Placebo
Sponsor
Novartis Pharmaceuticals