Acknowledgements

We thank M. A. R. Franco, V. A. Serrão, G. Chesini, S. Aristilde, R. Oliveira, T. H. R. Marques, A. Matikainen, and H. Ludvigsen for their contributions to the development of the research reported herein.

This work was funded by the São Paulo Research Foundation (Fapesp, grant #2014/50632-6), the Financiadora de Estudos e Projetos (Finep, grant #01.12.0393.00), and the National Council for Scientific and Technological Development (CNPq).
