781
Effects of dopamine and of a dopaminergic blocker , haloperidol , on the responses of carotid body chemoreceptors to hypoxia and hypercapnia were investigated in 16 anesthetized cats .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
Answer:
 None