Vieira, Joana
Pinto, Carla
Afonso, Mariana
do Bom Sucesso, Maria
Lopes, Paula
Pinheiro, Manuela
Veiga, Isabel
Henrique, Rui
Teixeira, Manuel R
Article History
Received: 7 February 2014
Revised: 30 May 2014
Accepted: 20 June 2014
First Online: 30 July 2014
Competing interests
: The authors declare no conflict of interest.