1. Division of Ophthalmology, Iwamizawa Municipal Hospital, Iwamizawa, Japan.
2. Department of Anatomy, Tokyo Dental College, Chiba, Japan.
3. Department of Neurology, Wonkwang University School of Medicine and Hospital, Institute of Wonkwang Medical Science, Iksan, Korea.
4. Division of Physical Therapy, Ongoul Rehabilitation Hospital, Jeonju, Korea.
5. Division of Internal Medicine, Iwamizawa Kojin-kai Hospital, Iwamizawa, Japan.