Turkstani, A., O. Ibraheim, G. Khairy, A. Alseif, and N. Khalil. 2019. “Spinal Versus General Anesthesia for Laparoscopic Cholecystectomy: A Comparative Study of Cost Effectiveness and Side Effects”. Anaesthesia, Pain & Intensive Care, February, 9-14. https://apicareonline.com/index.php/APIC/article/view/566.