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Fig. 2.

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Fig. 2. Sleep spindle of BDZ users. A sinusoidal wave of 11 to 16 Hz appears. Time base is 30 second (1 epoch). Amplitude is 70 μV/cm.
Korean J Clin Lab Sci 2021;53:333-41 https://doi.org/10.15324/kjcls.2021.53.4.333
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