الفهرس 
INTRODUCTION AND AIM OF THE WORKOnly 14 pages are availabe for public view
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Abstract
Acknowledgement
I wonld like to take this opportunity to express my
deep thanks and gratitude to my teacher and advisor,
Professor Dr. Mahmoud Essawy, Professor of Pediatrics,
Faculty of Medicine, Ain-Shams University, for his considerable
support and help, and his continuous guidance.
It has been my good fortune to work under his supervision.
My gratitude also goes to Professor Dr. Hussein ElDamasy,
Professor of Medicine and Endocrinology, Faculty
of Medicine, Ain-Shams University, for his valuable advice
and unfailing support,
My deepest thanks are also extended to Dr. Mohammed
Salah El-Din El-Kholy, Lecturer of Pediatrics, Faculty of
Medicine, Ain-Shams University, for encouraging me to
proceed with this work, and for his real ~1idance and
support.
I am greatly indebted to Dr. Galila Mokhtar, Lecturer
of Pediatrics, Faculty of Medicine, Ain-Shams University,
for her continuous ~idance throughout this work, and
for her generous advice and willingness to help. I am
really grateful to her.
And last, but by no means least, I wish to thank all
the biochemists of Ain-Shams University Endocrinology
Unit, for their help in the practical part of this