1884
Etoricoxib and diclofenac treatment resulted in similar efficacy ( PGADS mean changes from baseline - 0 . 62 vs - 0 . 58 , 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