ZhangY.- dong, YangQ., JiangZ.- min, MaW., ZhouS.- wei and XieD.- rong (2011) “Overall Survival of Patients with Advanced Pancreatic Cancer Improved with an Increase in Second-Line Chemotherapy after Gemcitabine-Based Therapy”, JOP. Journal of the Pancreas, 12(2), pp. 131-137. doi: 10.6092/1590-8577/3340.