1. Tampere Center for Child, Adolescent and Maternal Health Research, Faculty of Medicine and Health Technology Tampere University Tampere Finland
2. Department of Ear and Oral Diseases Tampere University Hospital Tampere Finland
3. Tays Cancer Center Tampere University and Tampere University Hospital Tampere Finland
4. Faculty of Medicine and Health Technology Tampere University Tampere Finland
5. Institute of Dentistry University of Eastern Finland Kuopio Finland