Affiliation: | a Department of Pedodontics and Orthodontics, Institute of Dentistry, University of Helsinki, PO Box 63, FIN-00014 Helsinki, Finland b Department of Oral Pathology, Institute of Dentistry, University of Helsinki, Helsinki, Finland c Department of Oral and Maxillofacial Diseases, Helsinki University Central Hospital, Helsinki, Finland d Institute of Biotechnology, University of Helsinki, Helsinki, Finland e Academy of Finland, Finland f Department of Food and Environmental Hygiene, Faculty of Veterinary Medicine, University of Helsinki, Helsinki, Finland g National Veterinary and Food Research Institute, Kuopio Department, Kuopio, Finland h Department of Pathology, Helsinki University Central Hospital, Helsinki, Finland |