RT Journal Article SR Electronic T1 Esmolol: a viable option for current antinociceptive clinical research JF Regional Anesthesia & Pain Medicine JO Reg Anesth Pain Med FD BMJ Publishing Group Ltd SP 683 OP 684 DO 10.1136/rapm-2019-100450 VO 44 IS 6 A1 Brian Williams YR 2019 UL http://rapm.bmj.com/content/44/6/683.2.abstract AB