1. Department of Endocrinology and Diabetes, Yokohama City University Medical Center.
2. Department of Biostatistics and Epidemiology, Yokohama City University Medical Center.
3. Tokui Medical Clinic.
4. Motomachi Takatuka Medical Clinic.
5. Department of Ophthalmology, Yokohama City University Medical Center.
6. Sato Clinic.
7. Department of Endocrinology and Metabolism, Yokohama City University School of Medicine.