1. Instituto Nacional de Biodiversidad, (INBio). http://www.inbio.ac.cr/es/default/html (Accessed June, 1 2017).
2. Tropical rainforests: potential source of new drugs?;Soejarto;Perspect. Biol. Med.,1989
3. Race, ethnicity, immigration and living conditions in Costa Rica;Gradin;Rev. Income Wealth,2016
4. Costa Rica restructures health system to curb financial crisis;Boddiger;Lancet,2012
5. Costa Rica Health Profile 2014. World Health Organization. Accessed February 1, 2017, from http://www.who.int/countries/cri/en/.