The Effects of Laser, Radiofrequency and Needle Electrode Electrical Stimulation Apply to Improvement of Skin Functions
Thesis (Doctoral) - Yongin University Graduate School: Department of Physical Therapy 2013. 8
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[The Effects of Laser, Radiofrequency and Needle Electrode Electrical Stimulation Apply to Improvement of Skin Functions]

Please refer to the paper of Janus.