Abstract
Bakhsh W, Saleh A, Yokogawa N, Gruber J, Rubery PT, Mesfin A. Cervical ossification of the posterior longitudinal ligament: a computed tomography–based epidemiological study of 2917 patients. Global Spine J. 2019;9:820–825. (Original DOI:10.1177/2192568219833658)
Figure 1a on page 821 was incorrectly attributed to Tanaka et al, which includes a similar but different figure. Figure 1a should have been attributed to Kudo et al. The complete reference details are provided below and should have been included in the reference list. Tanaka M, Kanazawa A, Yonenobu K. Diagnosis of OPLL and OYL: Overview. 2nd ed. Tokyo, Japan: Springer; 2006:111-114 should not have been included in the reference list.
The correct citation for Figure 1a is:
Kudo H, Yokoyama T, Tsushima E, et al. Interobserver and intraobserver reliability of the classification and diagnosis for ossification of the posterior longitudinal ligament of the cervical spine. Eur Spine J. 2013;22:205-210.