2224-7920 2224-7920 S2224-79202019000100055 Cuba 00 04 2019 00 04 2019 31 1 55 57 1999 85 8-9 8-9 765-9 2017 b 2017 a 11 1 1 49-52 2017 2017 2012 2017 55 2 2 380-3 2016 4 3 3 338-67 2016 217 1 1 7-13 2014 9 6 6 323-44