1. Department of General Surgery The First Affiliated Hospital of Soochow University Suzhou Jiangsu P.R. China
2. Department of Gastrointestinal Surgery, Huai'an Second People's Hospital the Affiliated Huai'an Hospital of Xuzhou Medical University Huaian Jiangsu P.R. China
3. Department of Hepatobiliary Surgery Huaiyin People's Hospital Huai Yin Jiangsu P.R. China
4. Department of Thyroid and Breast Surgery Huai'an Second People's Hospital Huaian Jiangsu P.R. China
5. Department of Hepatobiliary and Pancreatic Surgery the Affiliated Hospital of Xuzhou Medical University Xuzhou Jiangsu P.R. China