Corrigendum to “Pain Relieving Effect of Intraoperative Chemical Splanchnicectomy of Celiac Ganglions in Patients with Resectable Pancreatic or Gastric Masses: A Randomized Clinical Trial” - Jalal Vahedian; Amir Saraee; Massoud Baghai Wadji; Paniz Motaghi; Kia Vosoughi; Saeed Safari; Abdolhamid Chavoshi Khamneh (Pain Research and Management)