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Welte, T., Miravitlles, M., Hernandez, P., Eriksson, G., Peterson, S., Polanowski, T., et al. (2009) Efficacy and Tolerability of Budesonide/Formoterol Added to Tiotropium in Patients with Chronic Obstructive Pulmonary Disease. American Journal of Respiratory and Critical Care Medicine, 180, 741-750.
https://doi.org/10.1164/rccm.200904-0492OC

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