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APA Citation
Dahl, R., Chapman, K., Rudolf, M., Mehta, R., Kho, P., Alagappan, V., Berhane, I., Chen, H., & Banerji, D. (n.d.). p190 QVA149 Once Daily Provides Significant Improvements in Lung Function Over 1 Year in Patients with COPD: The Enlighten Study. Thorax, 67, A146–A147. http://access.bl.uk/ark:/81055/vdc_100144716256.0x000036