The authors wish to correct a descriptive statistical statement in the above article. This correction does not affect the methodology, the figures, the Bland–Altman agreement analysis, the discussion, or the conclusions of the study.
In the Results section (“Setup error distribution”), the reported values were the mean displacements and were inadvertently labelled as medians during revision. The sentence reading “The median setup errors were 0.02 cm (X), 0.07 cm (Y) and 0.07 cm (Z), with interquartile ranges remaining within ± 0.5 cm across all directions” should read:
“The mean setup errors were 0.02 ± 0.22 cm (X), 0.07 ± 0.41 cm (Y) and 0.07 ± 0.40 cm (Z), with most individual displacements remaining within ± 0.5 cm across all directions.”
The authors apologise for this error and confirm that it does not alter the findings or conclusions of the study.
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