A Registry for Evaluation of Efficiency and Safety of Surgical Treatment of Cartilage Defects: The German Cartilage Registry (KnorpelRegister DGOU).
Julia MaurerBirgit GrotejohannCarolin JenknerCarla SchneiderThomas FluryAdrian TassoniPeter AngeleJürgen FritzDirk AlbrechtPhilipp NiemeyerPublished in: JMIR research protocols (2016)
German Clinical Trials Register: DRKS00005617; https://drks-neu.uniklinik-freiburg.de/ drks_web/navigate.do?navigationId=trial.HTML&TRIAL_ID=DRKS00005617 (Archived by WebCite at http://www.webcitation.org/6hbFqSws0).