Text and Data Mining valid from 2018-06-14
Received: 1 May 2017
Accepted: 19 April 2018
First Online: 14 June 2018
Compliance with Ethical Standards
: This study was funded by Fundação de Amparo à Pesquisa do Estado de São Paulo. Grant number 2012/05438-1 and 2012/11306-0.
: The authors declare that they have no conflict of interest.