Volume 21, Issue 1, January 2017, Pages 191-194
Mohamed Esam Ahmed; Ashraf Ahmed; abdelrahman_khalifa@med.sohag.edu.eg abdelrahman_khalifa@med.sohag.edu.eg
Volume 21, Issue 1, January 2017, Pages 247-257
Mohamed Ali Ahmed; Ashraf Ahmed; Abdelrahman Hafez Khalifa; Anis Shiha