1608-8921 1608-8921 S1608-89212021000100116 Cuba 00 04 2021 00 04 2021 23 1 116 122

1 2012 25 4 4 2 1981 137 2 2 395-8 3 2018 22 5 5 584-90 4 2008 73 2 2 80-4 5 2017 43 4 4 77-83 6 2016 6 1 1 7 2016 89 1 1 109-14