作者: Sven Poulsen

Göran Koch is Professor Emeritus at the Department of Pediatric Dentistry, The Institute for Postgraduate Dental Education, Jönköping, Sweden. Sven Poulsen is Professor Emeritus at the Section for Paediatric Dentistry, Department of Dentistry and Oral Health, Aarhus University, Aarhus, Denmark. Ivar Espelid is Professor at the Department of Paediatric Dentistry and Behavioral Science, Institute of Clinical Dentistry, University of Oslo, Oslo, Norway. Dorte Haubek is Professor at the Section for Paediatric Dentistry, Department of Dentistry and Oral Health, Aarhus University, Aarhus, Denmark.