MicroRNA-21 in Pancreatic Ductal Adenocarcinoma Tumor-Associated Fibroblasts Promotes Metastasis Kadera, Brian E. ; Li, Luyi ; Toste, Paul A. ; Wu, Nanping ; Adams, Curtis ; Dawson, David W. ; Donahue, Timothy R. Abstract Publication: PLoS ONE Pub Date: August 2013 DOI: 10.1371/journal.pone.0071978 Bibcode: 2013PLoSO...871978K