Funding for this research was provided by:
Brazilian Funding Authority for Studies and Projects (01090421)
Brazilian National Council of Technological and Scientific Development (565037/2010-2, 457050/2013-6, 405009/2012-7)
Community Committee for International Students of Stanford University Bechtel International Center (Spouse Education Fund 2016)
Text and Data Mining valid from 2019-04-08
Received: 22 May 2018
Accepted: 3 February 2019
First Online: 8 April 2019
Compliance with ethical standards
: The authors declare that they have no conflict of interest.
: The present study was approved by the appropriate ethics committee, and all procedures performed were in accordance with the ethical standards of the 1964 Declaration of Helsinki and its later amendments.