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Flow chart of patient attrition.
Note: *Medications include: inhaled corticosteroids, long-acting β2-agonists, SABA, and SAMA.
Abbreviations: CB, chronic bronchitis; COPD, chronic obstructive pulmonary disease; ED, emergency department; INP, inpatient hospitalization; OV, physician office visit; SABA, short-acting β2-agonist; SAMA, short-acting muscarinic antagonist.
