TY - JOUR AU - Yang, J Y; Song, H S; Lee, M; Bohlman, H H; Riew, K D TI - Adjacent level ossification development after anterior cervical fusion without plate fixation JO - Spine IS - 01 VL - 34 PY - 2009 DO - 10.1097/BRS.0b013e318190d833 L3 - PubMed-ID: 19127159 SP - 30 EP - 33 ER -