چكيده
I have to thank so many people for the important role they played in development of this study that I cannot do justice to everybody’ s contribution. First of all I should thank Allah for His help through the years.
Then, I am greatly indebted to Dr. Masoud Saeedi whose help and support during writing this thesis were manifested in more ways than I can say without writing another thesis on the subject. His wise counsel during the editing of my thesis drafts, his always immediate, unconditional and insightful advice, precious support, and human compassion have been crucial to the completion of this thesis. I also acknowledge the cooperation and assistance of Dr. Farzaneh khodabandeh who provided me with helpful and precious comments and advice during different stages of writing this thesis. Special thanks go to my fellow colleagues and friends who were open and receptive to me as an investigator, and I could not have done this study without their input and help. I wish to thank my family whose love, encouragement, and continuous support throughout all my previous academic endeavors has continued to be a precious source of inspiration. Finally, I alone have to answer for any faults and any shortcomings of this study. To, all, many thanks for your assistance and encouragement.
