A. Hussein - University of Khartoum
S. Ibrahim - Daoud Research Group, Member, Khartoum, Sudan
A. Siddig - Al-Neelain University
F. Yasin - Omdurman Teaching Hospital, Department Of Medicine, Kharotum, Sudan
A. Babikir - Daoud Research Group, Member, Khartoum, Sudan
O. Gadour - Daoud Research Group, Member, Khartoum, Sudan
O. Aladil - International University of Africa
M. Saad - Daoud Research Group, Member, Khartoum, Sudan
A. Hamad - Daoud Research Group, Member, Khartoum, Sudan
M. Malk Aldar - Jazan Teaching Hospital, Department of neurology, Jazan, Saudi Arabia
E. Mahmoud - Daoud Research Group, Member, Khartoum, Sudan
M. Osman - Daoud Research Group, Head of Documentation Office, Khartoum, Sudan