| Affiliation: | 1. Division of Population and Patient Health, King's College London Dental Institute, , London, UK;2. Departamento de Odontología Social, Facultad de Estomatología, Universidad Peruana Cayetano Heredia, , Lima, Perú;3. Department of Oral Public Health, Institute of Dentistry, University of Helsinki, , Helsinki, Finland;4. Department of Community Dentistry, Institute of Dentistry, University of Oulu, , Oulu, Finland;5. National Institute for Health and Welfare, , Helsinki, Finland;6. Department of Oral Public Health, Institute of Dentistry, University of Eastern Finland, , Kuopio, Finland;7. Department of Oral and Maxillofacial Surgery, Kuopio University Hospital, , Kuopio, Finland |
