0138-6557 0138-6557 S0138-65572021000400043 Cuba Cuba 00 12 2021 00 12 2021 50 4 1 2019 44 6 6 1-9 2 2019 39 3 3 184-91 3 2018 41 4 4 287-93 4 2021 8 1 1 5 2015 40 4 4 331-7