Physical Therapy Rehabilitation Science : eISSN 2287-7584 / pISSN 2287-7576

Fig. 1.

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Fig. 1. Flow chart for selection of subjects diagnosed with COPD in KNHANES data Abbreviation: KNHANES, Korea National Health and Nutrition Examination Survey.
Phys Ther Rehabil Sci 2023;12:229-39 https://doi.org/10.14474/ptrs.2023.12.3.229