1. Faculty of Dentistry, Costa Rica University, 1493-3000 San José, Costa Rica
2. Endodontics Postgraduate Program, Faculty of Dentistry, San Luis Potosi University, 78290 San Luis Potosi, SLP, Mexico
3. Basic Sciences Laboratory, Faculty of Dentistry, San Luis Potosi University, 78290 San Luis Potosi, SLP, Mexico
4. Research and Development, Axopod Consultants for Life, 110921 Bogotá, Colombia