Diagnostic Value of Quantitative EUS Elastography for Malignant Pancreatic Tumors: Relationship with Pancreatic Fibrosis - Schrader, H.; Wiese, M.; Ellrichmann, M.; Belyaev, O.; Uhl, W.; Tannapfel, A.; Schmidt, W.; Meier, J. (Ultraschall in der Medizin - European Journal of Ultrasound, 2012)