2709-7927 2709-7927 S2709-79272020000200268 Cuba Cuba 00 06 2020 00 06 2020 14 2 268 275

1 1982 2 2004 3 1985 4 2013 6 5 2006 6 2014 25 7 2002 8 2003 9 2016 11 1 1 151-63 10 2007 11 1994 12 18/1 1/ 20 13 2014 18 2 2 181-7 14 2002 18 4 4 248-50 15 2014 20 1 1 3-17