Efficacy of Dexmedetomidine as an Adjuvant in Subarachnoid Block versus Transversus Abdominis Plane Block in Patients Undergoing Total Abdominal Hysterectomy under Spinal Anaesthesia: A Double-blinded Randomised Clinical Study - Rachana S Kori; J Vasantha Kumar; Shilpa Nijalingappa Bingi; Sharmila Somayaji (JOURNAL OF CLINICAL AND DIAGNOSTIC RESEARCH, 2026)