1. Department of Periodontology Center for Biomedical Research Faculty of Dentistry Universidad de Los Andes Santiago Chile
2. Department of Pathology Faculty of Dentistry Universidad de Chile Santiago Chile
3. Department of Statistics Faculty of Dentistry Universidad Mayor Santiago Chile
4. Department of Public Health and Epidemiology Faculty of Dentistry Universidad de Los Andes Santiago Chile
5. Center for Research and Innovation in Maternal‐Fetal Medicine (CIMAF) Department of Obstetrics and Gynecology Sótero del Río Hospital Santiago Chile
6. Division of Obstetrics and Gynecology Faculty of Medicine Pontificia Universidad Católica de Chile Santiago Chile
7. Department of Oral and Maxillofacial Diseases University of Helsinki and Helsinki University Hospital Helsinki Finland
8. Division of Periodontology Department of Dental Medicine Karolinska Institute Huddinge Sweden
9. Department of Obstetrics and Gynecology Center for Biomedical Research Faculty of Medicine Universidad de Los Andes Santiago Chile