European Panel on the Appropriateness of Gastrointestinal Endoscopy (EPAGE): Conclusion and WWW Site - Vader, J.-P.; Froehlich, F.; Dubois, R. W.; Beglinger, C.; Wietlisbach, V.; Pittet, V.; Ebel, N.; Gonvers, J.-J.; Burnand, B. (Endoscopy, 1999)