1. Faculty of Dentistry, Chulalongkorn University, Bangkok, Thailand;
2. Department of Pediatric Dentistry, Faculty of Dentistry, Chulalongkorn University, Bangkok, Thailand;
3. Department of Orthodontics, Faculty of Dentistry, Chulalongkorn University, Bangkok, Thailand;
4. Department of Cariology and Operative Dentistry, Tokyo Medical and Dental University, Tokyo, Japan;
5. Fersens väg, Malmö, Sweden