Avendaño, Roberto
Chaves, Nefertiti
Fuentes, Paola
Sánchez, Ethel
Jiménez, Jose I.
Chavarría, Max
Article History
Received: 6 July 2016
Accepted: 25 October 2016
First Online: 15 November 2016
Competing interests
: The authors declare no competing financial interests.