Concepts of a Web-based Open Distributed Textbook for the Multimodal Diagnostics of Gastrointestinal Tumours with MRI, CT and Video-endoscopy Addressing Students of Medicine and Students of Medical Informatics as two Different Target Groups. - Alexander Horsch; Paul Hellerhoff; Markus Hogg; H. Ahlbrink; T. Balbacha; Thomas Liß; K. Minov; Paul Gerhardt (MedInfo, 1998)