1. ETEP (Etiology and Therapy of Periodontal Diseases) Research Group University Complutense Madrid Spain
2. BIOCRAN (Craniofacial Biology) Research Group University Complutense Madrid Spain
3. Department of Oral Health Sciences KU Leuven & Dentistry (Periodontology) University Hospitals Leuven Leuven Belgium
4. Department of Periodontology Dental Research Division Guarulhos University Guarulhos Brazil