1. Department of General Medicine, Fukuoka Tokushukai General Hospital, Fukuoka 816-0864, Japan
2. The Graduate School of Medical Sciences, Kumamoto University, Kumamoto 860-8556, Japan
3. Tokunoshima Tokushukai General Hospital, Kagoshima 891-7101, Japan
4. Department of Clinical Nutrition, Kindai University Hospital, Osaka 589-8511, Japan
5. Department of Clinical Engineering, Faculty of Health Care Sciences, Jikei University of Health Care Sciences, Osaka 532-0003, Japan