| 1. | Siegel RL, Miller KD, Jemal A. Cancer statistics, 2017. CA Cancer J Clin, 2017, 67(1): 7-30. | 
				                                                        
				                                                            
				                                                                | 2. | Kamisawa T, Wood LD, Itoi T, et al. Pancreatic cancer. Lancet, 2016, 388(10039): 73-85. | 
				                                                        
				                                                            
				                                                                | 3. | 姚汝铖, 郑军, 邢荣春. 微小RNA在胰腺癌中的研究进展. 中国普外基础与临床杂志, 2012, 19(8): 911-915. | 
				                                                        
				                                                            
				                                                                | 4. | Hernandez YG, Lucas AL. MicroRNA in pancreatic ductal adenocarcinoma and its precursor lesions. World J Gastrointest Oncol, 2016, 8(1): 18-29. | 
				                                                        
				                                                            
				                                                                | 5. | Xu J, Cao Z, Liu W, et al. Plasma miRNAs effectively distinguish patients with pancreatic cancer from controls: a multicenter study. Ann Surg, 2016, 263(6): 1173-1179. | 
				                                                        
				                                                            
				                                                                | 6. | Qu K, Zhang X, Lin T, et al. Circulating miRNA-21-5p as a diagnostic biomarker for pancreatic cancer: evidence from comprehensive miRNA expression profiling analysis and clinical validation. Sci Rep, 2017, 7(1): 1692. | 
				                                                        
				                                                            
				                                                                | 7. | Duell EJ, Lujan-Barroso L, Sala N, et al. Plasma microRNAs as biomarkers of pancreatic cancer risk in a prospective cohort study. Int J Cancer, 2017, 141(5): 905-915. | 
				                                                        
				                                                            
				                                                                | 8. | Schmittgen TD, Livak KJ. Analyzing real-time PCR data by the comparative C(T) method. Nat Protoc, 2008, 3(6): 1101-1108. | 
				                                                        
				                                                            
				                                                                | 9. | de la Santa LG, Retortillo JA, Miguel AC, et al. Radiology of pancreatic neoplasms: an update. World J Gastrointest Oncol, 2014, 6(9): 330-343. | 
				                                                        
				                                                            
				                                                                | 10. | Pietryga JA, Morgan DE. Imaging preoperatively for pancreatic adenocarcinoma. J Gastrointest Oncol, 2015, 6(4): 343-357. | 
				                                                        
				                                                            
				                                                                | 11. | Ballehaninna UK, Chamberlain RS. The clinical utility of serum CA 19-9 in the diagnosis, prognosis and management of pancreatic adenocarcinoma: an evidence based appraisal. J Gastrointest Oncol, 2012, 3(2): 105-119. | 
				                                                        
				                                                            
				                                                                | 12. | Decker GA, Batheja MJ, Collins JM, et al. Risk factors for pancreatic adenocarcinoma and prospects for screening. Gastroenterol Hepatol (N Y), 2010, 6(4): 246-254. | 
				                                                        
				                                                            
				                                                                | 13. | Duffy MJ, Sturgeon C, Lamerz R, et al. Tumor markers in pancreatic cancer: a European Group on Tumor Markers (EGTM) status report. Ann Oncol, 2010, 21(3): 441-447. | 
				                                                        
				                                                            
				                                                                | 14. | Goonetilleke KS, Siriwardena AK. Systematic review of carbohydrate antigen (CA 19-9) as a biochemical marker in the diagnosis of pancreatic cancer. Eur J Surg Oncol, 2007, 33(3): 266-270. | 
				                                                        
				                                                            
				                                                                | 15. | Kawaguchi T, Komatsu S, Ichikawa D, et al. Clinical impact of circulating miR-221 in plasma of patients with pancreatic cancer. Br J Cancer, 2013, 108(2): 361-369. | 
				                                                        
				                                                            
				                                                                | 16. | Schultz NA, Dehlendorff C, Jensen BV, et al. MicroRNA biomarkers in whole blood for detection of pancreatic cancer. JAMA, 2014, 311(4): 392-404. | 
				                                                        
				                                                            
				                                                                | 17. | Meng QC, Qiu WW, Wen ZQ, et al. Novel blood-based microRNA biomarkers for diagnosis of pancreatic cancer: a meta-analysis. Tumori, 2015, 101(2): 199-205. | 
				                                                        
				                                                            
				                                                                | 18. | Liu R, Chen X, Du Y, et al. Serum microRNA expression profile as a biomarker in the diagnosis and prognosis of pancreatic cancer. Clin Chem, 2012, 58(3): 610-618. | 
				                                                        
				                                                            
				                                                                | 19. | Frampton AE, Giovannetti E, Jamieson NB, et al. A microRNA meta-signature for pancreatic ductal adenocarcinoma. Expert Rev Mol Diagn, 2014, 14(3): 267-271. | 
				                                                        
				                                                            
				                                                                | 20. | Abue M, Yokoyama M, Shibuya R, et al. Circulating miR-483-3p and miR-21 is highly expressed in plasma of pancreatic cancer. Int J Oncol, 2015, 46(2): 539-547. | 
				                                                        
				                                                            
				                                                                | 21. | du Rieu MC, Torrisani J, Selves J, et al. MicroRNA-21 is induced early in pancreatic ductal adenocarcinoma precursor lesions. Clin Chem, 2010, 56(4): 603-612. | 
				                                                        
				                                                            
				                                                                | 22. | Wang J, Chen J, Chang P, et al. MicroRNAs in plasma of pancreatic ductal adenocarcinoma patients as novel blood-based biomarkers of disease. Cancer Prev Res (Phila), 2009, 2(9): 807-813. | 
				                                                        
				                                                            
				                                                                | 23. | Cote GA, Gore AJ, McElyea SD, et al. A pilot study to develop a diagnostic test for pancreatic ductal adenocarcinoma based on differential expression of select miRNA in plasma and bile. Am J Gastroenterol, 2014, 109(12): 1942-1952. | 
				                                                        
				                                                            
				                                                                | 24. | Sempere LF, Preis M, Yezefski T, et al. Fluorescence-based codetection with protein markers reveals distinct cellular compartments for altered MicroRNA expression in solid tumors. Clin Cancer Res, 2010, 16(16): 4246-4255. | 
				                                                        
				                                                            
				                                                                | 25. | Ryu JK, Hong SM, Karikari CA, et al. Aberrant microRNA-155 expression is an early event in the multistep progression of pancreatic adenocarcinoma. Pancreatology, 2010, 10(1): 66-73. |