1. Institute of Dentistry; University of Oulu; Oulu Finland
2. Centre for Military Medicine; Finnish Defence Forces; Riihimäki Finland
3. Department of Mathematical Sciences; University of Oulu; Oulu Finland
4. Department of Cariology; Endodontology and Pediatric Dentistry; Research Unit of Oral Health Sciences; University of Oulu; Finland
5. University of Helsinki; Helsinki Finland
6. Medical Research Center; University of Oulu; Oulu University Hospital; Oulu Finland