1. Department of Endocrinology and Metabolism, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kyoto 602-8566, Japan
2. Department of Diabetes & Endocrinology, Japanese Red Cross Kyoto Daiichi Hospital, Kyoto 605-0981, Japan
3. Department of Endocrinology and Diabetology, Ayabe City Hospital, Kyoto 623-0011, Japan
4. Department of Diabetology, Kameoka Municipal Hospital, Kyoto 621-0826, Japan