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. 2014 May 30;9(5):e97149. doi: 10.1371/journal.pone.0097149

Figure 1. Patient record selection.

Figure 1

n = 10,338,432 research-quality patients in CPRD-COPD; n = 645,287 new users of ICS-containing or new users of LABD medications COPD: chronic obstructive pulmonary disease; HES: Hospital Episode Statistics; ICS: inhaled corticosteroid; LABD: long-acting bronchodilator.