European spine journal : official publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society
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To evaluate which cervical level is the most appropriate level to measure occipitocervical inclination (OCI). ⋯ C5 cervical level is the most appropriate level for OCI measurement. OCI should be measured at the same cervical level at all time. C4 OCI can reliably substitute C5 OCI in case C5 which is invisible on radiographic image. These slides can be retrieved under Electronic Supplementary Material.
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Unfortunately, the affiliation for the following authors was incorrectly published in the original publication.
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The preoperative X-ray presented in Figure 1 of the original publication erroneously was not the latest radiographic image taken before the index surgery at the age of 3 years.