1. Division of Internal Medicine, Onagawa Municipal Hospital
2. Department of Cardiology, Mie University Graduate School of Medicine
3. Department of Cardiology, Iwate Prefectural Central Hospital
4. Division of Internal Medicine, Sendai Tokushukai Hospital
5. Department of Family and Child Nursing, and Midwifery, Shinshu University School of Health Sciences
6. Division of Internal Medicine, Saito Hospital