1028-9933 1028-9933 S1028-99332018000601160 Cuba 00 12 2018 00 12 2018 97 6 1160 1172

1 2006 2 1988 3 1998 4 2007 43-5 5 2006 6 1976 7 2006 8 2008 49-57 9 2006 10 2006 11 2008 12 2007 13 2007 14 2007