1684-1824 1684-1824 S1684-18242020000301960 Cuba 00 06 2020 00 06 2020 42 3 1960 1963 1 2015 31 4 4 2 2017 33 2 2 199-208 3 2018 9 1 1 90-8 4 2017 56 4 4 242-321