1028-9933 1028-9933 S1028-99332018000601189 Ecuador Cuba 00 12 2018 00 12 2018 97 6 1189 1200

1 2006 2 2011 15 7 7 3 2004 4 2011 5 2011 6 2011 48 4 4 7 1993 27 2 2 206-13 8 2006 70 8 8 809-19 9 2008 10 2008 11 2010 14 2 2 12 2008 1-8 13 2008 51-67 14 2011 15 2004 16 2002