1. Radiation Safety Department, Nuclear and Radiological Regulatory Authority, Cairo, Egypt
2. Laser Sciences (Department of Medical Applications of Laser), National Institute of Laser Sciences, Cairo University, Cairo, Egypt
3. Applied Statistic in Radiation Safety Department, Nuclear and Radiological Regulatory Authority, Cairo, Egypt
4. Applied Statistic, Ain-Shams University, Cairo, Egypt
5. Safety and Prevention of Oncology in Radiation Protection Department, Nuclear and Radiological Regulatory Authority, Cairo, Egypt
6. Childhood Studies & Pediatric Oncology, Ain-Shams University, Cairo, Egypt