1. Department of Restorative Dentistry, Araraquara School of Dentistry São Paulo State University –UNESP São Paulo Brazil
2. Division of Endodontics University of Minnesota School of Dentistry Minneapolis Minnesota USA
3. Division of Basic & Translational Research, Department of Surgery University of Minnesota Minneapolis Minnesota USA
4. Department of Diagnostic and Biological Sciences, School of Dentistry University of Minnesota Minneapolis Minnesota USA