1. Department of Hepatobiliary Surgery, The Second Affiliated Hospital of Chongqing Medical University, China
2. Emergency Department, The Second Affiliated Hospital of Chongqing Medical University, China
3. Department of Geriatrics, The Fifth People’s Hospital of Chengdu, China
4. Department of Hepatobiliary Surgery, The People’s Hospital of Dazu District, China
5. School of Public Health and Management, Research Centre for Medicine and Social Development, Innovation Centre for Social Risk Governance in Health, Chongqing Medical University, China
6. Department of Cardiology, The Second Affiliated Hospital of Chongqing Medical University, China
7. Paediatric Surgery Centre, Qingdao Women and Children’s Hospital, Qingdao University, China *These two authors should be considered joint corresponding authors.