Carvalho, Andre Couto http://orcid.org/0000-0001-5757-9429
Machado, Ana
Embalo, Adulai Robalo
Bordalo, Adriano A.
Article History
Received: 26 August 2017
Revised: 29 October 2017
Accepted: 20 November 2017
First Online: 28 December 2017
Compliance with ethical standards
: This study was conducted according to the guidelines laid down in the Declaration of Helsinki and all procedures involving human subjects were approved by the ICBAS-University of Porto. Verbal informed consent was obtained from all subjects or guardians. Verbal consent was witnessed and formally recorded.
: The authors declare that they have no conflict of interest.