About the Authors

Élcio Leal

elcioleal@gmail.com

Affiliation Federal University of Pará, Belém, Brazil

Fabiola E. Villanova

Affiliation Federal University of Pará, Belém, Brazil

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: EL. Performed the experiments: FEV. Analyzed the data: EL FEV. Wrote the paper: EL FEV.