1. Department of Anesthesiology, Sohag Faculty of Medicine, Sohag University, Naser City, Egypt
2. Department of Anesthesiology, Qena Faculty of Medicine, South Valley University, Qena, Egypt
3. Department of Urology, Sohag Faculty of Medicine, Sohag University, Naser City, Egypt
4. Department of Urology, Qena Faculty of Medicine, South Valley University, Qena, Egypt