1. Department of General Medicine Anz Clinic Sayama City Saitama Japan
2. Department of Psycho‐oncology Saitama Medical University International Medical Center Hidaka City Saitama Japan
3. Department of General Medicine Ogano Central Hospital Ogano Town Saitama Japan
4. Department of Clinical Epidemiology Graduate School of Biomedical Sciences Nagasaki University Nagasaki City Nagasaki Japan
5. Department of Medical Oncology Mitsubishi Kyoto Hospital Kyoto City Kyoto Japan
6. Department of General Medicine Ito Internal Medicine and Pediatric Clinic Fukuoka City Fukuoka Japan