0864-0289 0864-0289 S0864-02892021000400005 Cuba 00 12 2021 00 12 2021 37 4 1 2018 2 5 5 757-69 2 2018 39 6 6 672-86 3 2016 100 2 2 422-8 4 2015 31 1 1 53-8 5 2020 52 4 4 1118-22 6 2021 36 2 2 208-12