TY - JOUR AU - Ahn, D K; Lee, S; Moon, S H; Boo, K H; Chang, B K; Lee, J I TI - Ossification of the ligamentum flavum JO - Asian Spine J IS - 1 VL - 8 PY - 2014 DO - 10.4184/asj.2014.8.1.89 SP - 89 EP - 96 ER -