1. First Affiliated Hospital of Chongqing Medical University; Yuanjiagang, Yuzhong District Chongqing People's Republic of China
2. Department of General Surgery; Peking University Shougang Hospital; Shijingshan District Beijing People's Republic of China
3. Department of Endocrinology; Third Hospital of Mianyang; Sichuan Province Mianyang People's Republic of China
4. Department of General Surgery; Ninth People's Hospital of Chongqing City; People's Republic of China
5. Department of Obstetrics and Gynaecology; Mianyang 404 Hospital, Sichuan Province, and Second Affiliated Hospital; Medical College of North Sichuan Mianyang People's Republic of China