Safety of a novel modular cage for transforaminal lumbar interbody fusion − clinical cohort study in 20 patients with degenerative disc diseaseMohamed Elmekaty, Emad ElMehy, Peter Försth, Anna MacDowall, Ahmed El Elemi, Mohamed Hosni and Yohan RobinsonSICOT-J, 4 (2018) 24DOI: https://doi.org/10.1051/sicotj/2018019