1. Department of Surgery 1 School of Medicine University of Occupational and Environmental Health Fukuoka Japan
2. Department of Gastrointestinal and Hepato‐Biliary‐Pancreatic Surgery Nippon Medical School Tokyo Japan
3. Occupational Health Data Science Centre University of Occupational and Environmental Health Fukuoka Japan
4. Department of Preventive Medicine and Community Health School of Medicine University of Occupational and Environmental Health Fukuoka Japan