1. A question of numbers;ISL, I.Loudon;Lancet,1976
2. To come again, 3 months;Anonymous,1976
3. Clinics for cancer patients;Sutton, M.;Lancet,1984
4. Value of outpatient follow-up after curative surgery for carcinoma of the large bowel;Cochrane, J.P.S.; Williams, J.T.; Faber, R.G.; Slack, W.W.;BrMedJ,1980
5. Value of a follow-up study for recurrent carcinoma of the colon and rectum;Ekman, C.-A.; Gustavson, J.; Henning, A.;Surg Gynecol Obstet,1977