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Fig. 3. Flow diagram of the patient inclusion process. MRI: magnetic resonance imaging, PRF: pulsed radiofrequency, DRG: dorsal root ganglion, Group IP: group inside of pedicle, Group OP: group outside of pedicle.
The Korean Journal of Pain 2019;32:280~285 https://doi.org/10.3344/kjp.2019.32.4.280
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