20033
In this light , the aim of this review is to summarize the main preclinical evidences of the potential of MDM2 inhibitors for the treatment of childhood cancers and the key suggestions coming from their assessment in the treatment of adult cancers as proof of concept for future pediatric clinical studies .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 None