About the Authors
- José María Gutiérrez
-
*To whom correspondence should be addressed. E-mail: jgutierr@icp.ucr.ac.cr
- R. David G Theakston
- David A Warrell
Competing Interests
Vicerrectoría de Investigación, Universidad de Costa Rica had no role in the preparation of this article. The authors have declared that no competing interests exist.