RT Journal Article SR Electronic T1 Evaluation of lumbar medial branch blocks: how does the second block influence progression to radiofrequency ablation? JF Regional Anesthesia & Pain Medicine JO Reg Anesth Pain Med FD BMJ Publishing Group Ltd SP 719 OP 721 DO 10.1136/rapm-2022-103754 VO 47 IS 12 A1 David Anthony Provenzano A1 Jozef E Leech A1 Jason S Kilgore A1 Lauren A Sugden YR 2022 UL http://rapm.bmj.com/content/47/12/719.abstract AB