1. Interoperative Research Center in Dental and Medical Sciences, Faculty of Dentistry, Universidad de Valparaíso, Valparaíso, Chile;
2. Nanobio-Corrosion Laboratory, Institute of Chemistry, Faculty of Sciences, Pontificia Universidad Católica de Valparaíso, Valparaíso, Chile;
3. Radiotherapy Unit, Carlos Van Buren Hospital, Valparaíso - San Antonio Health Service, MINSAL, Valparaíso, Chile;
4. Department of Physics, Universidad Técnica Federico Santa Maria, Valparaíso, Chile;
5. Department of Restorative Dentistry, Faculty of Dentistry, University of Illinois at Chicago, Chicago, IL, USA