The frequency and impact of tramadol addiction on acute aneurysmal subarachnoid hemorrhage: cross-sectional multicenter study Research Authors Ahmed Elbassiony; Eman M. Khedr; Ahmed Hegazy; Omar Abdelaleem Ragab; Hieder Al-Shami; Radwa K. Soliman; Ahmed Shoyb; Ahmed Aly Research Department Department of Neurology and Psychiatry Research Journal The Egyptian Journal of Neurology, Psychiatry and Neurosurgery Research Member Eman Mohamed Hussein Khedr