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Hermann, Gratiana; Konukiewitz, Björn; Schmitt, Anja; Perren, Aurel; Klöppel, Günter (2011). Hormonally defined pancreatic and duodenal neuroendocrine tumors differ in their transcription factor signatures: expression of ISL1, PDX1, NGN3, and CDX2. Virchows Archiv, 459(2), pp. 147-54. Berlin: Springer 10.1007/s00428-011-1118-6
