A simplified score to quantify comorbidity in COPD. by Nirupama Putcha, Milo A Puhan, M Bradley Drummond, MeiLan K Han, Elizabeth A Regan, Nicola A Hanania, Carlos H Martinez, Marilyn Foreman, Surya P Bhatt, Barry Make, Joe Ramsdell, Dawn L DeMeo, R Graham Barr, Stephen I Rennard, Fernando Martinez, Edwin K Silverman, James Crapo, Robert A Wise, Nadia N Hansel

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