What percentage of all cases of COPD is caused by alpha1-antitrypsin deficiency?
a. 2% to 3%
b. 10% to 15%
c. 25% to 40%
d. 50% to 75%
ANS: A
Accounting for 2% to 3% of all cases of COPD, alpha1-antitrypsin deficiency is severely under-recognized by health care providers, but it affects an estimated 100,000 Americans.
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