[1] Department of Quantitative Health Sciences and Alliance Statistics and Data Management Center,Department of Surgery, Division of Surgical Oncology
[2] Mayo Clinic,Department of Colon and Rectal Surgery, Division of Surgery
[3] University of Wisconsin,Department of Medicine, College of Medicine, Comprehensive Cancer Center
[4] School of Medicine and Public Health,undefined
[5] The University of Texas MD Anderson Cancer Center,undefined
[6] The Ohio State University,undefined