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Resistant hypertension is another area where endothelin receptor blockers might potentially play a role , while the pathophysiological role of endothelin in atherosclerotic coronary artery disease is well - established and the relative research goes on .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
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