1. Facultad de Odontología, División de Estudios de Posgrado e Investigación Universidad Nacional Autónoma de México CDMX Mexico
2. Clinic of Operative Dentistry, Periodontology and Preventive Dentistry University Hospital, Saarland University Homburg/Saar Germany
3. Department of Biomedical Engineering, School of Engineering Virginia Commonwealth University Richmond Virginia USA
4. Institute of Experimental and Clinical Pharmacology and Toxicology Saarland University Homburg/Saar Germany