CHGA and digestive system neuroendocrine neoplasm: Nielsen Nielsen K K Binderup Binderup T T Langer Langer SW SW Kjaer Kjaer A A Knigge Knigge P P Grøndahl Grøndahl V V P53, Somatostatin receptor 2a and Chromogranin A immunostaining as prognostic markers in high grade gastroenteropancreatic neuroendocrine neoplasms P53, Somatostatin receptor 2a and Chromogranin A immunostaining as prognostic markers in high grade gastroenteropancreatic neuroendocrine neoplasms Bmc Cancer Bmc Cancer 2020 2020 20 20 1 1 27 27 10.1186/s12885-019-6498-z 10.1186/s12885-019-6498-z supplied-pmid 31924180?