Assertion: tumor stroma | /r/HasProperty | endothelial cells
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Source sentences:
text: Indeed, postnatal mammary stroma is composed of many cell types, including periductal fibroblasts and white adipocytes, endothelial cells, nerve cells, and a variety of infiltrating immune cells, including macrophages and eosinophils, which play an important role in postnatal branching (10).