Correction to: ICMx 7, 49 (2019)

https://doi.org/10.1186/s40635-019-0262-1

Following publication of the original article [1], the authors reported an error in Eq. 2 of the article; the article is missing brackets.

Please find the correct version (with the brackets added) of the equation in this correction.

The authors apologize for any inconvenience caused.

$$ \frac{Q_S}{Q_T}=\frac{C_{c\hbox{'}}{O}_2-{C}_a{O}_2}{C_{c\hbox{'}}{O}_2-\left({C}_a{O}_2-\frac{VO_2}{Q}\right)} $$