S Larsen

Growth of colorectal polyps: redetection and evaluation of unresected polyps for a period of three years.

M. Vatn, H. Huitfeldt, T. Rognum, 1996, Gut.

Epidemiology of polyps in the rectum and colon. Recovery and evaluation of unresected polyps 2 years after detection.

M. Vatn, G. Hoff, J. Sauar, 1986, Scandinavian journal of gastroenterology.