| http://www.w3.org/ns/prov#value | - In the United States, tobacco use, especially smoking, is a key factor in the development and progression of COPD, but asthma, exposure to air pollutants in the home and workplace, genetic factors, and respiratory infections also play a role in the development of COPD. In less developed parts of the world, indoor air quality is thought to play a larger role in the development and progression of CO
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