Correction to: BMC Anesthesiol 21, 156 (2021)

https://doi.org/10.1186/s12871-021-01373-y

Following publication of the original article [1], the authors reported an error in the image of Fig. 1 wherein some data are cut off. The correct figure is shown below.

Fig. 1
figure 1

Flow diagram of the study

The original article has been corrected.