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Twenty healthy male volunteers ( mean age 24 years ; range 18 - 38 years ) received intradermal injections of glutamate and capsaicin in the volar forearm .
 Chemical: glutamate; Chemical: capsaicin
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 Chemical: glutamate; Chemical: capsaicin