Affiliation: | 1.Department of Gastrointestinal Surgery, First Affiliated Hospital,Sun Yat-sen University,Guangzhou,China;2.Department of Pathology, First Affiliated Hospital,Sun Yat-sen University,Guangzhou,China;3.Department of General Surgery, Seventh Affiliated Hospital,Sun Yat-sen University,Shenzhen,China;4.General Surgical Laboratory, First Affiliated Hospital,Sun Yat-sen University,Guangzhou,China |