RT Journal Article SR Electronic T1 Levobupivacaine plasma level between erector spinae plane block and thoracic paravertebral block JF Regional Anesthesia & Pain Medicine JO Reg Anesth Pain Med FD BMJ Publishing Group Ltd SP 90 OP 91 DO 10.1136/rapm-2020-101406 VO 46 IS 1 A1 Abdelghafour Elkoundi A1 Hicham Balkhi A1 Mustapha Bensghir A1 Abdelouahed Baite YR 2021 UL http://rapm.bmj.com/content/46/1/90.1.abstract AB