copd is always caused by cigarette smoking Causes & Symptoms Chronic Obstructive Pulmonary Disease (or

Chronic Obstructive Pulmonary Disease (or COPD) is an umbrella term to describe progressive lung diseases such as chronic bronchitis and emphysema. Symptoms don't usually appear until later in life, which makes it COPD Causes and Risk Factors NHLBI, NIH Tobacco and COPD: presenting the World Health Organization (WHO) Tobacco Knowledge Summary Respiratory Research Springer Nature Link The Role of Smoking in the Mechanisms of Development of Chronic Obstructive Pulmonary Disease and Atherosclerosis

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