AB199. SOH21AS175. Investigating the use of dorsal ramus nerve root blocks as a solution to post-operative pain and morphine requirements in lumbar spine surgery - Rigney, Brian; Williams, Mark; Wafai, Ahmad; Walder, Andrew (Mesentery and Peritoneum; Vol 5 (March 04, 2021): Mesentery and Peritoneum (Abstracts for The Sylvester O'Halloran Virtual Perioperative Symposium 2021 (Mesentery and Peritoneum), 2021)