Explain the two main disease that are categorized under COPD are chronic bronchitis and emphysema.
How many patients are suffering from COPD in the United States? Do COPD sufferers die of respiratory causes or other causes?
Explain the two main disease that are categorized under COPD are chronic bronchitis and emphysema.
How many patients are suffering from COPD in the United States? Do COPD sufferers die of respiratory causes or other causes?