7Dr. Ted F. Bader M.D.. Colorectal cancer in patients older than 75 years of age[J] 1986,Diseases of the Colon & Rectum(11):728～732
8Mr. John E. Payne M.B., B.S., F.R.C.S.E., F.R.A.C.S., F.A.C.S.,Pierre H. Chapuis D.S. (Qld.), F.R.A.C.S.,Murray T. Pheils M.A.M. Chir. (Camb.), F.R.C.S., F.R.A.C.S.. Surgery for large bowel cancer in people aged 75 years and older[J] 1986,Diseases of the Colon & Rectum(11):733～737
10Dr. J. P. Arnaud M.D.,M. Schloegel M.D.,J. C. Ollier M.D.,M. Adloff M.D.. Colorectal cancer in patients over 80 years of age[J] 1991,Diseases of the Colon & Rectum(10):896～898
