Identifying an X-Ray Threshold for Cage Subsidence After Single-Level Minimally Invasive Transforaminal Lumbar Interbody Fusion: A Diagnostic Threshold Study Using Intraoperative CT as the Reference Standard. - Kartal A; Salama GR; Chung LK; Manalil NF; Elsayed GA; Härtl R (Journal of clinical medicine, 2026)