1. Department of Medical Technology , Kawasaki University of Medical Welfare , Okayama, 701-0193 , Japan
2. Division of Food and Nutrition , Nakamura Gakuen University Junior College , Fukuoka, 814-0198 , Japan
3. Department of Psychiatry , Kawasaki Medical School , Okayama, 701-0192 , Japan
4. Department of Neuropsychiatry, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences , Okayama University , Okayama, 700-8558 , Japan
5. Department of Medical Technology, Graduate School of Health Sciences , Okayama University , Okayama , Japan