1. Department of Human Genetics, Graduate School of Public Health, 500 Cellomics Bldg., University of Pittsburgh, 100 Technology Dr., Pittsburgh, PA 15219;
2. Center for Craniofacial and Dental Genetics, Division of Oral Biology, School of Dental Medicine, University of Pittsburgh, PA;
3. Department of Prosthodontics, Faculty of Dentistry, Benghazi, Libya -currently Department of Restorative Dentistry, Ajman University of Science and Technology, Ajman, UAE-;
4. Department of Orthodontics, School of Dental Medicine, University of Pittsburgh, PA
5. -currently Department of Orthodontics, Ministry of Health, Kuwait-;