23630
Risk of ischemic stroke with the use of risperidone , quetiapine and olanzapine in elderly patients : a population - based , case - crossover study .
 Chemical: risperidone; Chemical: quetiapine; Chemical: olanzapine
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: risperidone; Chemical: quetiapine; Chemical: olanzapine