1726-6718 1726-6718 S1726-67182019000300002 Cuba 00 12 2019 00 12 2019 18 3 1 2012 41 6-8 2 2018 17 2 2 1-7 3 2015 14 230-45 4 2017 9 4 4 279-81 5 2012 83 10 10 1191-200 6 2016 27 46-54 7 2017 16 54-88 8 2018