1. CICECO; Materials and Ceramic Engineering Department; University of Aveiro, Campus de Santiago; 3810-193 Portugal
2. Fac. Medicina Dentária, Laboratory for Bone Metabolism and Regeneration, Univ. do Porto; Portugal
3. Facultad de Farmacia, Departamento de Química Inorgánica y Bioinorgánica, Universidad Complutense de Madrid. Plaza de Ramón y Cajal s/n; 28040 Madrid Spain
4. TEMA-NRD; Mechanical Engineering Department; University of Aveiro; 3810-193 Portugal