1409-0015 1409-0015 S1409-00152016000200133 Costa Rica Costa Rica 00 12 2016 00 12 2016 33 2 133 137

1 2003 41-9 2 2011 162-8 3 2009 23-34 4 2010 5 2006 35-46 6 2009 337-9 7 2015 , 7 2 2 168-70 8 2001 124-7 9 2011 997-1001