Justino, Ana
Dias, Patrícia
João Pina, Maria
Sousa, Sónia
Cirnes, Luís
Berta Sousa, Ana
Carlos Machado, José
Costa, José Luis http://orcid.org/0000-0001-7132-4094
Article History
Received: 14 February 2014
Revised: 3 April 2014
Accepted: 8 April 2014
First Online: 4 June 2014
Competing interests
: The authors declare no conflict of interest.