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However , treatment - emergent adverse events and treatment discontinuations occurred more frequently with combination therapy than with exemestane alone , suggesting a need for careful benefit / risk assessment prior to initiating therapy .
 Chemical: exemestane
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: exemestane