1999
In this investigation the behavioural effects of chronic ( two week ) treatment with 5 - FU and ( three weeks ) with Fluoxetine either separately or in combination with 5 - FU were tested on adult Lister hooded rats .
 Chemical: 5 - FU; Chemical: Fluoxetine; Chemical: 5 - FU
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: 5 - FU; Chemical: Fluoxetine; Chemical: 5 - FU