Freitas, Ferdinando B.
Frouco, Gonçalo
Martins, Carlos
Ferreira, Fernando http://orcid.org/0000-0001-5765-576X
Article History
Received: 25 October 2017
Accepted: 12 February 2018
First Online: 22 February 2018
Competing Interests
: The authors declare no competing interests.