2272
Similarly , the total protein abundance of the Na - K - 2Cl cotransporter ( NKCC2 ) in the medulla but not in the cortex of the + / + mice was significantly reduced by lithium treatment .
 Chemical: Na; Chemical: K; Chemical: 2Cl; Chemical: lithium
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
 Entities: Na, K, 2Cl, lithium 
Answer:
 Chemical: Na; Chemical: K; Chemical: 2Cl; Chemical: lithium