1409-4142 1409-4142 S1409-41422016000100013 Costa Rica 00 12 2016 00 12 2016 18 1-2 13 16

1 2014 129 1483-92 2 2009 119 1728-35 3 2010 27 486-90 4 2010 16 10 10 510-5 5 2005 31 611-20 6 2011 39 4 4 731-7 7 2015