(B) SOFG staining of spinal entheseal tissue and Immunohistochemical analysis of CaSR+ and Runx2+ cells in human spinal tissue. The bottom panels show higher magnification of the boxed area in the top panels. Data information: SP: spinous process; IL: interspinous ligament; SL: supraspinous ligament; UIL: uncalcified interspinous ligament; TZ: transitional zone. Data shown as mean ± SD.. ** P < 0.01 compared between groups. Scale bar: 100μm 