1. Department of Periodontology; Dentistry Faculty; Universidad de los Andes; Santiago Chile
2. Epidemiology; Dentistry Faculty; Universidad de los Andes; Santiago Chile
3. CIBRO; Centre of Regeneration and Oral Biology; Universidad de los Andes; Santiago Chile
4. Oral Laboratory of Biotechnology and Microbiology; Dentistry Faculty; Universidad Andrés Bello; Santiago Chile
5. Department of Obestetrics & Gynaecology and Foetal Medicine Unit; Reproductive Biology; Universidad de los Andes; Santiago Chile