Emphysema: Symptoms, Signs, Treatment & Life Expectancy
https://www.emedicinehealth.com/emphysema/article_em.htm
Cigarette smoking is by far the most dangerous behavior that causes people to develop emphysema, and it is also the most preventable cause. Other risk factors include a deficiency of an enzyme called alpha-1-antitrypsin, air pollution, airway reactivity, heredity, male sex, and age. The importance of cigarette smoking as a risk factor for developing emphysema cannot be …
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