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However , it is unknown whether angiotensin II ( Ang II ) , a potent profibrotic molecule , would regulate KCa3 . 1 channels in cardiac fibroblasts and participate in cell proliferation .
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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:
 None