Table 1.
AAI : atlantoaxial instability, Ant : anterior, CSM : cervical spondylotic myelopathy, DISH : diffuse idiopathic skeletal hyperostosis, DWI : deep wound infection, F/D : fracture/dislocation, F : fracture, OPLL : ossification of posterior longitudinal ligament, postop : postoperative, RA : rheumatoid arthritis