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Tags: 2009, asthma, Belfer M H, chronic obstructive pulmonary disease, controlled-trial, differentiating copd, double-blind, Dyspnea, Follow-up, General & Internal Medicine, Journal Article or Conference Abstract Publication, obstructive pulmonary-disease, Postgraduate medicine, questionnaire, randomized, receptor partial agonist, risk-factors, smoking-cessation, Spirometry, sustained-release bupropion, symptom-based, tobacco smoking
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