Intrathecal bupivacaine-fentanyl and bupivacaine-dexmedetomidine for cesarean section: a randomized controlled trial - Urooj, Sana; Mughal, Anum; Shareef, Madiha; Naz, Arshi; Shah, Muzaffar; Siddiqui, Safia (Anaesthesia, Pain & Intensive Care, 2022)