1. Institutional Doctorate in Engineering and Science Materials, Universidad Autónoma de San Luis Potosí; S.L.P. Mexico
2. Laboratory of Basic Science, Faculty of Dentistry, Universidad Autónoma de San Luis Potosí; S.L.P. Mexico
3. Laboratoire de Génie chimique, University of Liège, Chemistry Institute; Liège Belgique
4. Interfacultary Center of Biomaterials, Université de Liège, Chemistry Institute; Liège Belgique