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Median duration of response was 34 . 4 months , and it was higher in patients who received RD until progression ( not reached versus 19 months , p < 0 . 001 ) .
 Chemical: RD
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: RD