1727-897X 1727-897X S1727-897X2019000200173 Cuba Cuba 00 04 2019 00 04 2019 17 2 173 179

1 2001 2 1998 37 37 123-8 3 2012 4 2017 3-7 5 2015 54 3 3 6 6 1990 4 4 4 3-23