1726-6718 1726-6718 S1726-67182019000300003 Cuba 00 12 2019 00 12 2019 18 3 1 ECURED 2019 2 2010 10 Español 10 3 2012 21 4 4 457-62 4 2015 24 1 1 91 5 2007 54 626-9 6 2016 69 2 2 193-6 7 2014 113 910-21