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. 2014 May 20;9:501–512. doi: 10.2147/COPD.S58136

Figure 1.

Figure 1

Search flowchart.

Abbreviations: BNI, British Nursing Index and Archive; CINAHL, Cumulative Index to Nursing and Allied Health Literature; COPD, chronic obstructive pulmonary disease; HRQoL, health-related quality of life.