TY - JOUR AU - Xu, R; Sciubba, D M; Gokaslan, Z L; Bydon, A TI - Ossification of the ligamentum flavum in a Caucasian man JO - J Neurosurg Spine IS - 5 VL - 9 PY - 2008 DO - 10.3171/SPI.2008.9.11.427 SP - 427 EP - 437 ER -