1. University of Puthisastra, Phnom Penh, Cambodia
2. Henry M. Goldman School of Dental Medicine, Boston University, Boston, Massachusetts, USA
3. Oral Health Bureau, Department of Preventive Medicine, Ministry of Health, Phnom Penh, Cambodia
4. University of California Berkely, California, USA
5. Centre for Epidemiology and Biostatistics and Melbourne Dental School, University of Melbourne, Melbourne, Australia
6. UNICEF Cambodia, Phnom Penh, Cambodia