I would like to extend my most sincere thanks to the college president Advocate Zaki
Kamal for his support of this research. I also wish to thank Dr Raed Zidan for his assistance in the statistical
analysis. My profound thanks also go to Dr Iyad Dkedik, Dr. Ahmad Bashir and Ms. Aiysha Sindyani for
their scientific advice. Many thanks to Professor Avi Hofstein for his fruitful advice.