de Lange, TSvensen, A MLarsen, SAabakken, L2020-02-102020-02-102006-02-27http://dx.doi.org/10.1016/j.gie.2005.11.053https://lib.digitalsquare.io/xmlui/handle/123456789/27143Validation studies of medical images are required before the general use of new imaging techniques and they necessitate a substantial number of observers Multicenter studies are desirable but the logistic challenges are considerableThe functionality and reliability of an Internet interface for assessments of endoscopic still images and video clips: distributed research in gastroenterology.