1409-4142 1409-4142 S1409-41422019000200011 Costa Rica Costa Rica 00 12 2019 00 12 2019 21 2 11 14

1 1998 66:3 2. 2015 83 254-256. 3 2006 59 284-288. 4. 2014 71 367-372. 5 2012 1 1-3 6 1963 86 7 2010 122 1159-66 8 2011 74 516-9