Funding for this research was provided by:
Foundation for Research Support in the State of Minas Gerais, Brazil (Process number CDS-APQ-03594-12)
Coordination for the Improvement of Higher Education (Process number 23038.009788/2010-78)
Text and Data Mining valid from 2017-04-21
Received: 19 September 2016
Accepted: 10 April 2017
First Online: 21 April 2017
Compliance with ethical standards
: This study received support from the Foundation for Research Support in the State of Minas Gerais, Brazil (FAPEMIG-process no. CDS-APQ-03594-12) and the Coordination for the Improvement of Higher Education (CAPES), an entity of the Brazilian Government that coordinates human resources (AUX-PE-PRO-HEALTH EDUCATION 2034/2010–process no. 23038.009788/2010-78).
: The authors declare that they have no conflict of interest.
: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards.The present study was approved by the Human Research Ethics Committee of the <i>Universidade Federal de Viçosa</i> (UFV) under protocol no. 044/2012.
: Informed consent was obtained from all individual participants included in the study. As per Resolution 466/2012 of the National Health Council, which regulates research involving human subjects, the participants signed a free and informed statement of consent, which ensured the confidentiality of the data and the anonymity of the participants.