Ampulla of Vater Enterochromaffin Cell Serotonin-Producing Neuroendocrine Tumor
ampulla of vater enterochromaffin cell serotonin-producing neuroendocrine tumor
Ampulla of Vater EC-Cell Serotonin-Producing Neuroendocrine Tumor
ampulla of vater ec-cell serotonin-producing neuroendocrine tumor