Funding for this research was provided by:
National Science Foundation (1461297)
Coordination for the Improvement of Higher Education of Brazil
Received: 9 June 2017
Accepted: 16 March 2018
First Online: 6 April 2018
Ethics approval and consent to participate
: This study has not directly involved humans, animals or plants.
: Not applicable.
: The authors declare that they have no competing interests.
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