1. Department of Oral Public Health; Institute of Dentistry; University of Eastern Finland; Kuopio Finland
2. Department of Oral and Maxillofacial Diseases; Faculty of Medicine; University of Helsinki; Helsinki Finland
3. The Living Environment and Health Unit; National Institute for Health and Welfare (THL); Kuopio Finland
4. The Health Monitoring Unit; National Institute for Health and Welfare (THL); Helsinki Finland
5. Department of Oral and Maxillofacial Surgery; Kuopio University Hospital; Kuopio Finland