Spine
-
A retrospective study. ⋯ 3.
-
Retrospective study comparing postoperative clinical outcomes after cervical laminoplasty between K-line (-) ossification of the posterior longitudinal ligament (OPLL) and K-line (+) OPLL in the neck-flexed position. ⋯ 4.
-
Retrospective database review. ⋯ 4.
-
Laboratory study. ⋯ N/A.