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Additional Information

Competing Interests

The authors declare that they have no competing interests.

Author Contributions

Gustavo M. E. M. Prado conceived and designed the experiments, performed the experiments, analyzed the data, contributed reagents/materials/analysis tools, wrote the paper, prepared figures and/or tables, reviewed drafts of the paper.

Luiz Eduardo Anelli conceived and designed the experiments, analyzed the data, contributed reagents/materials/analysis tools.

Guilherme Raffaelli Romero analyzed the data, contributed reagents/materials/analysis tools, wrote the paper, prepared figures and/or tables, reviewed drafts of the paper.

Funding

This project was supported by the Pró-Reitoria de Pesquisa da Universidade de São Paulo, under the undergraduate research program granted to G.M.E.M.P. in the year 2013 to 2014, and by Programa de Pós-Graduação em Geoquímica e Geotectônica do Instituto de Geociências da Universidade de São Paulo. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.


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