Department of Biotechnological Processes;
School of Engineering Chemical;
University of Campinas;
Campinas 13083-970;
Brazil;
Department of Pharmacy;
Faculty of Pharmaceutical Sciences;
University of So Paulo;
So Paulo 05508-900;
Brazil;
Faculty of Health Sciences;
Fernando Pessoa University;
Rua Carlos da Maia;
296;
4200-150 Porto;
Portugal;
Institute for Biotechnology and Bioengineering;
Centre of Genomics and Biotechnology;
University of Traás-os-Montes e Alto Douro(IBB-CGB/UTAD);
5001-801 Vila Real;
Portugal;
Didanosine; Pellets; Gastro-resistance; Coating; Microspheres; Chitosan;