1. Department of Medicine Kihoku HospitalWakayama Medical UniversityWakayamaJapan
2. First Department of MedicineWakayama Medical University Wakayama Japan
3. Division of Diabetes and Metabolism Satellite Clinic for Integrative and Anti‐Aging Medicine Wakayama Medical University WakayamaJapan
4. Wakayama Rosai Hospital WakayamaJapan
5. Kansai University of Health Sciences Osaka Japan
6. Health‐promotion Research Center Wakayama Japan