[1] Cairo Univ, Cardiol, Fac Med, Cairo, Egypt
[2] Al Azhar Univ, Neurosurg, Fac Med, Cairo, Egypt
[3] Minya Univ, Cardiol, Fac Med, Al Minya, Egypt
[4] Harvard Med Sch, Dept Global Hlth, Neurosurg, Boston, MA USA
[5] Cairo Univ, Pharm, Fac Pharm, Cairo, Egypt