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Such targets include the organic anion - transporting polypeptides ( OATPs in humans ; Oatps in rodents ) , a family of sodium - independent transporters that are endogenously expressed in the brain and are involved in drug uptake .
 Chemical: sodium
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: sodium