Seelam, Suresh Efficacy of single-shot ultrasound-guided erector spinae plane block for postoperative analgesia after mastectomy: A randomized controlled study. [electronic resource] - Saudi journal of anaesthesia - 22-27 p. digital Publication Type: Journal Article ISSN: 1658-354X Standard No.: 10.4103/sja.SJA_260_19 doi