Abstract
\subsection*{Additional Affiliation(s)}In the published article, there was an error regarding the affiliation(s) for \textbf{Guillermo Garc\'ia-S\'anchez}. As well as having affiliation \textbf{1}, they should also have \textbf{\textit{Escuela T\'ecnica Superior de Ingenieros de Telecomunicaci\'on, Universidad Polit\'ecnica de Madrid,28040 Madrid, Spain}}.\par 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.
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