This article was originally published online 8 July 2021 with the conflict of interest statement omitted. The statement “The authors have no conflicts to declare” has been added and it is correct as it appears online. AIP Publishing apologizes for this error.
Contributor Information
L. Valencia, Email: mailto:divelasc@ing.uc3m.es.
J. L. Jorcano, Email: mailto:lvalenci@ing.uc3m.es.