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a. Trends in use of inhaled steroids, long-acting β2-agonists, and steroid/ β2-agonist combination therapy (NAMCS). “Long-acting β2-agonist/steroids" depicts both fixed dose combinations and concurrent use of separate therapies. b. Trends in use of inhaled steroids, long-acting β2-agonists, and steroid/β2-agonist combination therapy (NDTI). “Long-acting β2-agonist/steroids" depicts both fixed dose combinations and concurrent use of separate therapies.
