28538
This study utilized mice to investigate the time frame and receptor mediation of estradiol ' s enhancement of cocaine - induced behavior as mice enable parallel use of genetic , surgical and pharmacological methods .
 Chemical: estradiol; Chemical: cocaine
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: estradiol; Chemical: cocaine