Saad, M.; Mowafy, A. A.; Taha, A. N.; Shalaby, A. R.; Shahein, M.; Ali, H. Effect of Sparing S1 Motion Segment on Spinopelvic-Sagittal Balance Relationship and Its Impact on Pain and Functional Outcome: A Retrospective Cohort Study of Single Center Experience. roneuro 2024, 38, 385-394.