1. A Simplified Score to Quantify Comorbidity in COPD Putcha, Nirupama; Puhan, Milo A.; Drummond, M. Bradley; Han, MeiLan K.; Regan, Elizabeth A.; Hanania, Nicola A.; Martinez, Carlos H.; Foreman, Marilyn; Bhatt, Surya P.; Make, Barry; Ramsdell, Joe; DeMeo, Dawn L.; Barr, R. Graham; Rennard, Stephen I.; Martinez, Fernando; Silverman, Edwin K.; Crapo, James; Wise, Robert A.; Hansel, Nadia N. 2014 Articles Lungs--Diseases, ObstructiveDyspneaComorbidityEpidemiologyMedicine