Manyam,Umadevi The Efficacy of Preoperative low thoracic erector spinae plane block for perioperative analgesia in lumbosacral spine surgery : A Prospective Observational study - Bhopal; AIIMS, July 2021 - 74;XXp HB Subjects--Topical Terms: Anesthesiology-- MD Thesis Dewey Class. No.: 378.242 / ANE