Colon Investigation With Barium Enema, CT Colonography and Colonoscopy: A Prospective Registration of Indications, Delay and Procedure Results.
see extensive protocol in Norwegian
Observational Model: Cohort, Time Perspective: Prospective
findings compared across investigation modes
events by dec 2014
Stein Dahler, MD
Blefjell Hospital Notodden, Norway
Norway:National Committee for Medical and Health Research Ethics