1. Hamdan Bin Mohammed College of Dental Medicine Mohammed Bin Rashid University of Medicine and Health Sciences Dubai United Arab Emirates
2. Faculty of Dentistry, Sir John Walsh Research Institute University of Otago Dunedin New Zealand
3. Department of Epidemiology and Biostatistics, Mel and Enid Zuckerman College of Public Health University of Arizona Tucson Arizona USA
4. Department of Dental Services Emirates Health Services Dubai United Arab Emirates