1881
RESULTS : Mean ( SD ; maximum ) duration of treatment was 19 . 3 ( 10 . 3 ; 32 . 9 ) and 19 . 1 ( 10 . 4 ; 33 . 1 ) months in the etoricoxib and diclofenac groups , respectively .
 Chemical: etoricoxib; Chemical: diclofenac
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: etoricoxib; Chemical: diclofenac