1. Department of NeurologyWonkwang University School of Medicine and Hospital, Institute of Wonkwang Medical ScienceIksan‐si Jeollabuk‐do, 54538 Republic of Korea
2. Division of Physical TherapyOngoul Rehabilitation HospitalWansan‐gu Jeonju‐si, 55097 Republic of Korea
3. Department of AnatomyAkita University School of MedicineAkita City, 010‐8502 Japan
4. Department of AnatomyTokyo Dental College, Chiyoda‐kuTokyo, 101‐0061 Japan
5. Division of Internal MedicineIwamizawa Asuka HospitalIwamizawa, 068‐0833 Japan
6. Department of Maxillofacial AnatomyGraduate School of Tokyo Medical and Dental UniversityTokyo Japan