Madariaga, Yisel González
Cárdenas, María Boffill
Irsula, Maibia Tamayo
Alfonso, Orestes Castillo
Cáceres, Bennia Alfonso
Morgado, Emoe Betancourt
Article History
Received: 10 April 2014
Accepted: 18 August 2014
First Online: 20 March 2015
Competing interests
: The authors declare no competing financial interests.