1608-8921 1608-8921 S1608-89212021000200115 Cuba Cuba Cuba 00 08 2021 00 08 2021 23 2 115 122

1 2007 60 6 6 684-7 2 2005 58 9 9 950-4 3 2003 27 8 8 581-6 4 2010 70 6 6 380-3 5 2008 61 1 1 87-91 6 2020 32 7 2019 72 6 6 612-5 8 2017 67 2 2 147-9 9 2009 31 3 3