1028-4818 1028-4818 S1028-48182020000601233 Cuba 00 12 2020 00 12 2020 24 6 1233 1241 1 2020 10 2 2 78-88 2 2020 10 2 2 3 2020 19 2 2 4 2020 34 2 2 5 Redacción Internacional 30/0 6/ 20 6 2020 7 2020 8 2020 11 17 17 1-57 9 2020 18 3 3 313-21