1. Faculty of Sciences; Electron Microscopy Laboratory; National Autonomous University of México (UNAM); Ciudad de Mexico Mexico
2. Faculty of Sciences; Department of Cell Biology; Cell Nano-Biology Laboratory; National Autonomous University of México (UNAM); Ciudad de Mexico Mexico
3. School of Higher Education of Zaragoza; National Autonomous University of México (UNAM); Ciudad de Mexico Mexico
4. Faculty of Dentistry; Periodontal Biology Laboratory; DEPeI; National Autonomous University of Mexico (UNAM); Ciudad de Mexico Mexico