Journal of the Norwegian Medical Association 2021; 141. doi: 10.4045/tidsskr.20.0351.
In this article, Figure 4 should read as follows:
Figure 4 Forest plot for the outcome measure duration of mechanical ventilation expressed as number of days. Comparison between early mobilisation and standard treatment. Studies with a moderate risk of bias are included (subgroups).
We apologise for the error, which has been corrected in the online version.