Abdelwahab Abdelsattar Saleh; Abdelfattah Mohammed Abdelfattah; Mohamed Hamdi Alqassas; Essam Shafiq Mohammad Abd El whab; Mohamed Ahmed Elbadawy Mohamed. Comparison Between Ultrasound-Guided Sciatic-Femoral Nerve Block and Unilateral Spinal Anaesthesia for Patients Undergoing Total Knee Arthroplasty; A Prospective Randomized Controlled Trial. J Popl Ther Clin Pharmacol 2023, 30, 552-559.