1. Department of Gastroenterology, The Second Affiliated Hospital of Dalian Medical University, Dalian, China
2. The First Affiliated Hospital of Dalian Medical University, Dalian, China
3. Department of Breast and Thyroid Surgery, Affiliated Hospital of Youjiang Medical University for Nationalities, Baise, Guangxi, China
4. Key Laboratory of Molecular Pathology in Tumors of Guangxi, Affiliated Hospital of Youjiang Medical University for Nationalities, Baise, Guangxi, China