1. Patient preferences for inhaler devices in chronic obstructive pulmonary disease: experience with Respimat® Soft MistTM inhaler;Hodder;Int. J. Chronic Obstr. Pulm. Dis.,2009
2. Managing comorbidities in COPD;Hillas;Int. J. Chronic Obstr. Pulm. Dis.,2015
3. Chronic obstructive pulmonary disease;Vijayan;Indian J. Med. Res.,2013
4. Dual therapy strategies for COPD: the scientific rationale for LAMA + LABA;Cohen;Int. J. Chronic Obstr. Pulm. Dis.,2016