1 Department of Neurology, Institute of Wonkwang Medical Science, Wonkwang University School of Medicine and Hospital, 895, Muwang-ro, Iksan-si, Jeollabuk-do, 54538, Republic of Korea. neurlogy@wonkwang.ac.kr.
2 Department of Anatomy, Tokyo Dental College, Tokyo, Japan.
3 Division of Internal Medicine, Cupid Clinic, Iwamizawa, Japan.
4 Department of Anatomy and Embryology, School of Medicine, Complutense University, Madrid, Spain.