Ribeiro, Patrícia O.
Silva, Henrique B.
Tomé, Ângelo R.
Cunha, Rodrigo A.
Antunes, Luís M.
Article History
Received: 29 March 2014
Accepted: 27 May 2014
First Online: 19 September 2014
Competing interests
: The authors declare no competing financial interests.