1. Macromolecular Department; Center of Biomaterials; University of Havana; Havana Cuba
2. Ceramics and Composites Department; Center of Biomaterials; University of Havana; Havana Cuba
3. Crystallography; Mineralogy and Mineral Deposits Department; Geology Faculty; University of Barcelona; Barcelona Spain
4. General Chemistry Department; Chemistry Faculty; University of Havana; Havana Cuba
5. Department of Material Science and Metallurgical Engineering; Technical University of Catalonia; Barcelona Spain