1. Department of Pathology, Saiseikai Tondabayashi Hospital, Osaka, Japan
2. Department of Morphological and Physiological Sciences, Graduate School of Health Sciences, Kumamoto University, Kumamoto, Japan
3. Department of Neurology, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan
4. Department of Surgery, Saiseikai Tondabayashi Hospital, Osaka, Japan