1. Laboratory of Drug Analysis, Faculty of Pharmacy, University of Costa Rica, San Jose, Costa Rica
2. Research and Development, Laboratorio Raven S.A, San Jose, Costa Rica
3. National Nanotechnology Laboratory (LANOTEC), National Center for High Technology (CeNAT), San Jose, Costa Rica
4. Chemistry School, National University, Heredia, Costa Rica
5. Laboratory of Pharmaceutical Physical Chemistry, Faculty of Pharmacy, University of Costa Rica, San Jose, Costa Rica