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Plasma renin concentration is significantly higher in the subcapsular venous outflow , which drains the superficial cortex , than in the deep venous outflow , which drains the inner half of the cortex and medulla of the cat kidney .
 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