In the original article, there was an error. In the Acknowledgements statement, we referenced funding that is not relevant to this article.
A correction has been made to the Acknowledgements section:
“We would like to thank Prof. John G. R. Jefferys and Dr. Jaroslav Hlinka for their valuable comments. This manuscript was supported exclusively by a grant from the Ministry of Health of the Czech Republic (AZV 15-29835A).”
The authors apologize for this error and state that this does not change the scientific conclusions of the article in any way. The original article has been updated.