AL-AHMED, IBRAHIM2022-05-182022-05-1820051718https://drepo.sdl.edu.sa/handle/20.500.14154/3542The proposal of this dissertation was submitted in partial fulfillment of therequirement of fellowship in neurosurgery, and approved by the Department of neurosurgery and the Research committee at King Faisal University, Dammam Since there is no separate ethics committee or board at the College of Medicine King Faisal UniversityenThesis