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Ligation of heparan sulfate proteoglycans ( HSPGs ) of endothelium with antithrombin ( AT ) induces cellular signalling events that alter the cell ' s biochemical and functional responses to inflammatory stimuli ( e . g . bacterial lipopolysaccharide [ LPS ] ) .
 endothelium, cellular, cell
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Anatomy 
Text: {0} 
Answer:
 endothelium, cellular, cell