2077-2874 2077-2874 S2077-28742020000300291 Cuba 00 09 2020 00 09 2020 12 3 291 295

1 2020 12 4 4 2 2020 23 2 2 3 2020 34 2 2 4 2020 12 2 2 5 2019 16 15 15 27-35 6 2018 9 9 323-33 7 2020 34 2 2