Egypt, Cairo, Egypt
Mahmoud Ahmed Abd Elmajeed Omar Hussien, Cairo, Egypt
Al-Azhar univeristy, Cairo, Egypt
Faculty of Dental Medicine, Al Azhar University, Cairo, Egypt
Al-Azhar University, El Cairo, Egypt
Al-Azhar university, Cairo, Egypt
International Islamic Center for Population Studies and Researches (IICPSR) - Al-Azhar University, Cairo, Al-Azhar University, Al-Darrasah, Egypt
Ehab tharwat, Damieta, New Damietta, Egypt
Faculty of Dentistry, AlAzhar University for Girls, Cairo, Egypt
Urology department - AlAzhar university, Cairo, Egypt