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APA Citation
Tashkin, D. P., Bateman, E. D., Jones, P., Zubek, V. B., Metzdorf, N., Liu, D., Leonard, T., Clerisme-Beaty, E., & Wise, R. A. (2016). consistent improvement in health-related quality of life with tiotropium in patients with chronic obstructive pulmonary disease: Novel and conventional responder analyses. Respiratory medicine, 120, 91–100. http://access.bl.uk/ark:/81055/vdc_100038918035.0x000039