The role of autologous bone grafting in matrix-associated autologous chondrocyte implantation at the knee: results from the German Cartilage Registry (KnorpelRegister DGOU) - Weishorn, Johannes; Tischer, Thomas; Niemeyer, Philipp; Renkawitz, Tobias; Bangert, Yannic (Knee surgery, sports traumatology, arthroscopy, 2024)