Fig. 1.
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Fig. 1.
Flow chart diagram. HIRA-NPS: Health Insurance Review & Assessment Service-National Patients Sample, KCD-7: Korean Standard Classification of Disease-7th revision, L-HIVD: lumbar herniated intervertebral disc.
J Korean Med Rehabi 2021;31:105-16
https://doi.org/10.18325/jkmr.2021.31.4.105
© 2021 J Korean Med Rehabi