About the Authors

David Ayllón

Contributed equally to this work with: David Ayllón, Fernando Seoane

david.ayllon@uah.es

Affiliations R&D Department, Fonetic, 28037 Madrid, Spain, Signal Theory and Communications Department, University of Alcala, Alcalá de Henares, Spain

Roberto Gil-Pita

Affiliation Signal Theory and Communications Department, University of Alcala, Alcalá de Henares, Spain

Fernando Seoane

Contributed equally to this work with: David Ayllón, Fernando Seoane

Affiliations Faculty of Care Science, Work Life and Social Welfare, University of Boras, Boras, Sweden, School of Technology and Health, Royal Institute of Technology, Huddinge, Sweden

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: DA FS. Performed the experiments: DA FS. Analyzed the data: DA RG FS. Contributed reagents/materials/analysis tools: DA FS. Wrote the paper: DA RG FS.