2399
We used stored plasma samples from 409 patients in the National Institute of Neurological Diseases and Stroke ( NINDS ) tissue plasminogen activator ( t - PA ) Stroke Trial to examine the relationship between an apolipoprotein ( Apo ) E2 or an Apo E4 phenotype and a favorable outcome 3 months after stroke , the risk of intracerebral hemorrhage , and the response to intravenous t - PA therapy .
 GENE: tissue plasminogen activator; GENE: t - PA; GENE: apolipoprotein ( Apo ) E2; GENE: Apo E4; GENE: t - PA
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: GENE 
Text: {0} 
Answer:
 GENE: tissue plasminogen activator; GENE: t - PA; GENE: apolipoprotein ( Apo ) E2; GENE: Apo E4; GENE: t - PA