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The objective of this study was to evaluate the arginine and GHRP - 2 tests as alternatives to the ITT for the diagnosis of AGHD in a Japanese population .
 Chemical: arginine
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: arginine