1. Department of General Surgery, The 6th Affiliated Hospital of Kunming Medical University, The People’s Hospital of Yuxi City, Yuxi, Yunan, China (mainland)
2. Department of Health Statistics and Epidemiology, Dali University, Dali, Yunnan, China (mainland)
3. Department of General Surgery, The 6th Affiliated Hospital of Kunming Medical University, Yuxi, Yunan, China (mainland)
4. Department of Orthopedic Surgery, The 6th Affiliated Hospital of Kunming Medical University, The People’s Hospital of Yuxi City, Yuxi, Yunan, China (mainland)