Citation:Klöppel G, Perren A, Heitz PU 2004

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Klöppel G, Perren A, Heitz PU. The gastroenteropancreatic neuroendocrine cell system and its tumors: the WHO classification. Ann N Y Acad Sci 2004 Apr;1014:13-27 Abstract available at

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  1. NETs guidelines/Histopathology