Title Search [BP OP 1-1] Clinical meaning of the existence of microbiome in gallbladder after laparoscopic cholecystectomy: Incidence and related factors Dokyoon MOON (Seoul National University, Korea) [BP OP 1-2] Study on the clinical characteristics of young age Pancreatic Cancer using KOTUS Registry Hyung Sun KIM (Yonsei University, Korea) [BP OP 1-3] Surgical and oncological outcomes from the experience of 5,000 Pancreatectomies in single institution Yoonhyeong BYUN (Eulji University, Korea) [BP OP 1-4] Preoperative serum carbohydrate antigen 19-9 levels predict early recurrence after the resection of early-stage pancreatic ductal adenocarcinoma Sarang HONG (University of Ulsan, Korea) [BP OP 1-5] Changes in total lymphocyte count and neutrophil-to-lymphocyte ratio after curative pancreatectomy in patients with pancreas adenocarcinoma and their prognostic role Eun Young KIM (The Catholic University of Korea) [BP OP 1-6] Initial treatment pattern and prognosis of exocrine pancreatic cancer in Korea from 2006 to 2017 Mee Joo KANG (National Cancer Center, Korea) [BP OP 1-7] MCT4 as a potential therapeutic target to augment gemcitabine chemosensitivity in resected pancreatic cancer Sung Hwan LEE (CHA University, Korea)