Department of Internal Medicine and Biomedical Research Institute Division of Gastroenterology Pusan National University Hospital Busan 49241 South Korea;
Department of Internal Medicine and Biomedical Research Institute Division of Gastroenterology Pusan National University Hospital Busan 49241 South Korea;
Department of Internal Medicine and Biomedical Research Institute Division of Hematology-Oncology Pusan National University Hospital Busan 49241 South Korea;
Department of Radiology Biomedical Research Institute Pusan National University Hospital Busan 49241 South Korea;
Department of Radiology Biomedical Research Institute Pusan National University Hospital Busan 49241 South Korea;
Department of Radiology Biomedical Research Institute Pusan National University Hospital Busan 49241 South Korea;
Department of Surgery Biomedical Research Institute Pusan National University Hospital Busan 49241 South Korea;
Combination chemotherapy; Gemcitabine; Pancreatic cancer; Elderly; Ductal carcinoma; Adverse drug event;