1. Division of Endocrinology and Metabolism, Department of Medicine, Kurume University School of Medicine, Kurume, Fukuoka 830-0011, Japan
2. Thyroid Center, Shin Koga Hospital, Kurume, Fukuoka 830-8577, Japan
3. Division of Nephrology and Endocrinology, Faculty of Medicine, Tohoku Medical and Pharmaceutical University, Sendai, Miyagi 983-8536, Japan
4. Department of Ophthalmology, Kurume University School of Medicine, Kurume, Fukuoka 830-0011, Japan
5. Diagnostic Division, Otsuka Pharmaceutical Co. Ltd., Tokyo 108-8242, Japan