1. Department of General Surgery, Tianjin Medical University General Hospital, Tianjin, China; Department of Oncological Surgery Baotou Central Hospital Baotou Inner Mongolia China
2. Department of General Surgery, Tianjin Medical University General Hospital, Tianjin, China; The First Affiliated Hospital of Baotou Medical College Baotou Inner Mongolia China
3. Department of General Surgery, Tianjin Medical University General Hospital, Tianjin, China; Huai’an Second People’s Hospital Huai’an Jiangsu China
4. Department of General Surgery Tianjin Medical University General Hospital Tianjin China