About the Authors

João D. Ferreira

joao.ferreira@lasige.di.fc.ul.pt

Affiliation LaSIGE, University of Lisbon, Lisbon, Portugal

Francisco M. Couto

Affiliation LaSIGE, University of Lisbon, Lisbon, Portugal

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: JDF FMC. Performed the experiments: JDF. Analyzed the data: JDF. Wrote the paper: JDF FMC.