2077-2874 2077-2874 S2077-28742020000400227 Cuba Cuba 00 12 2020 00 12 2020 12 4 227 234

1 1996 2 2020 34 2 2 3 2020 39 2 2 4 2020 23 2 2 5 2012 10 1 1 6 2013 2 1 1 7 2020 31 8 2009