*Department of Neurology, Dongguk University Ilsan Hospital

the †Department of Life Science, Dongguk University, Goyang, Republic of Korea

This study was approved by the institutional review board and was performed in accordance with the ethical standards laid down in the Declaration of Helsinki.

J.E.P.: conceptualized the research project, conduct analysis of data and preparation of the manuscript. J.-Y.H., S.-Y.L., and J.E.P.: methodology was implemented.

This work was supported by the Korean Society of Clinical Neurophysiology. The SSCI-8 was used with permission (healthmeasures.net).

The authors declare no conflict of interest.

Correspondence to: Jung E. Park, MD, MS, 27, Dongguk-ro, Ilsandong-gu, Goyang-si, Gyeonggi-do 10326, Republic of Korea. E-mail: [email protected].