Dual bronchodilation with once-daily QVA149 improves dyspnea and health status and reduces symptoms and rescue medication use in patients with COPD: The IGNITE trials
Donald Banerji, Vijay Alagappan, Yulia Green, Nicola Gallagher, Angel FowlerTaylor, Peter D'Andrea, Hungta Chen
European Respiratory Journal 2013 42: P3388; DOI: