1. Department of Oral and Maxillofacial Surgery, Fellowship in Maxillofacial Trauma, Health Services Kurdistan University of Medical Sciences Sanandaj Iran
2. Department of Oral and Maxillofacial Surgery, Fellowship in Maxillofacial Trauma, School of Dentistry Tehran University of Medical Sciences Tehran Iran
3. Department of Head and Neck Surgical Oncology and Reconstructive Surgery, The Cancer Institute, School of Medicine Tehran University of Medical Sciences Tehran Iran
4. Department of Oral and Maxillofacial Surgery, Dental School, Taleghani Hospital Shahid Beheshti of Medical Sciences Tehran Iran
5. Medical Biology Research Center Kermanshah University of Medical Sciences Kermanshah Iran
6. Department of Neurosurgery Kermanshah University of Medical Sciences Kermanshah Iran
7. Dentistry and Oral Health, Department of Rural Clinical Sciences, La Trobe Rural Health School La Trobe University Victoria Bendigo Australia
8. Violet Vines Marshman Centre for Rural Health Research, La Trobe Rural Health School La Trobe University Victoria Bendigo Australia