2077-2874 2077-2874 S2077-28742020000100248 Cuba Cuba 00 03 2020 00 03 2020 12 1 248 257 1 1983 22 1 1 32-9 2 1968 7 2 2 53-70 3 1977 16 9-11 4 1985 24 2 2 509-16 5 2003 42 1 1 6 2008