1Tianjin Medical University Cancer Institute and Hospital, National Clinical Research Center for Cancer, Tianjin’s Clinical Research Center for Cancer, Tianjin Key Laboratory of Digestive Cancer, Tianjin Union Medical Center, Tianjin Institute of Coloproctology, The First Affiliated Hospital of Nankai University, Tianjin, China.
2Cancer Medical Center, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Beijing, China.
3Department of Gastroenterology, Tianjin First Central Hospital, Tianjin, China.
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