TY - JOUR T1 - Upper trunk block: ‘primum non nocere’ JF - Regional Anesthesia & Pain Medicine JO - Reg Anesth Pain Med SP - 155 LP - 156 DO - 10.1136/rapm-2019-101162 VL - 45 IS - 2 AU - José Cros Campoy AU - Oscar Domingo Bosch AU - Xavier Sala-Blanch Y1 - 2020/02/01 UR - http://rapm.bmj.com/content/45/2/155.2.abstract N2 - ER -