About the Authors

Francisco J. Valverde-Albacete

fva@lsi.uned.es

Affiliation Departamento de Lenguajes y Sistemas Informáticos, Universidad Nacional de Educación a Distancia, Madrid, Spain

Carmen Peláez-Moreno

Affiliation Signal Theory and Communications Department, University Carlos III Madrid, Madrid, Spain

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: FJVA CPM. Performed the experiments: FJVA CPM. Analyzed the data: FJVA CPM. Contributed reagents/materials/analysis tools: FJVA CPM. Wrote the paper: FJVA CPM.