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In patients who had received no previous drug treatment , log baseline plasma renin activity and change in mean blood pressure after SQ 20881 correlated significantly ( r = 0 . 651 , P less than 0 . 05 ) .
 plasma renin
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: GENE 
Text: {0} 
Answer:
 plasma renin