Fig. 2From: Comparison of erector spinae plane and paravertebral nerve blocks for postoperative analgesia in children after the Nuss procedure: study protocol for a randomized controlled non-inferiority clinical trialFlowchart of the trial design. ESPB, erector spinae plane block; TPVB, thoracic paravertebral block; ASA, American Society of AnesthesiologistsBack to article page