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Park WY, Pt , Koo MM, Pt , Phd .  The Effects of Vibration Frequency and Amplitude on Serratus Anterior Muscle Activation During Knee Push-up Plus Exercise in Individuals with Scapular Winging.  J korean soc phys med 2018;13:67-74.  https://doi.org/10.13066/kspm.2018.13.4.67