Celli, B. R., Decramer, M., Asijee, G. M., Kupas, K., & Tashkin, D. P. (2015). Effects of Tiotropium on Exacerbations in Patients with COPD with Low or High Risk of Exacerbations: A Post-Hoc Analysis from the 4-Year UPLIFT® Trial. Chronic Obstr Pulm Dis.

Celli, Bartolome R., Marc Decramer, Guus M. Asijee, Katrin Kupas, a Donald P. Tashkin. "Effects of Tiotropium On Exacerbations in Patients With COPD With Low or High Risk of Exacerbations: A Post-Hoc Analysis From the 4-Year UPLIFT® Trial." Chronic Obstr Pulm Dis 2015.

Celli, Bartolome R., et al. "Effects of Tiotropium On Exacerbations in Patients With COPD With Low or High Risk of Exacerbations: A Post-Hoc Analysis From the 4-Year UPLIFT® Trial." Chronic Obstr Pulm Dis 2015.