1 Erratum to: Eur. Phys. J. C https://doi.org/10.1140/epjc/s10052-018-6379-7

The original version of this article unfortunately contained a mistake. There was an error in the article metadata related to the name of the author M. Finger Jr. which resulted in indexing problems.

The original article has been corrected.

Acknowledgements. Funded by SCOAP3.