Assuit University hospitals, Asyūţ, Assuit, Egypt
Qena Hospital, Qinā, Egypt
Al-Azhar University hospitals, Cairo, Egypt
Faculty of medicine, Cairo University, Cairo, Egypt
Faculty of Dentistary - Al-Azhar University, Cairo, Egypt
Faculty of medicine, Cairo University, Cairo, Egypt
Al-Azhar University hospitals, Cairo, Egypt
Faculty of Dentistary - Aswan University, Aswan, Egypt
Al-Azhar University hospitals, Cairo, Egypt
Faculty of Physical Therapy - Cairo University, Cairo, Egypt