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The expectations are high that systems biology will pave the way to the identification of novel disease genes , to the selection of successful drug candidates - - that do not fail in clinical studies due to toxicity or lack of human efficacy - - and finally to a more successful discovery of novel therapeutics .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
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