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The results demonstrated that 17beta - estradiol ( E2 ) induces neovascularization , as well as the growth and enlargement of blood vessels after 7 days of exposure .
 Chemical: 17beta - estradiol; Chemical: E2
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: 17beta - estradiol; Chemical: E2