Gastroenteropancreatic neuroendocrine neoplasms (GEP-NENs) originate from neuroendocrine cells in the gastrointestinal tract. They are heterogeneous. and though initially considered rare tumors. the incidence of GEP-NENs has increased in the last few decades. https://bookmarksaifi.com/story19588296/volatility-spillovers-and-the-role-of-leading-financial-centres