500
The objective of this study was to evaluate the direct health - care costs and management of RIHA during treatment of CHC in a clinical trial setting .
 Disease: RIHA; Disease: CHC
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:
 Disease: RIHA; Disease: CHC