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Terbutaline , a beta2 - adrenoceptor agonist used to arrest preterm labor , has been associated with increased concordance for autism in dizygotic twins .
 Terbutaline, preterm labor, autism
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 Terbutaline, preterm labor, autism