18754
In turn , the ligand - activated EGF receptor ( EGFR ) induces the expression of EGF family members , so - called " autoinduction . " However , it is not well understood how this autoinduction occurs .
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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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