Funding for this research was provided by:
Fundação de Amparo à Pesquisa do Estado de São Paulo (2016/03650-4)
Text and Data Mining valid from 2018-08-14
Received: 4 April 2018
Accepted: 17 July 2018
First Online: 14 August 2018
Compliance with ethical standards
: The authors declare that they have no conflict of interest.