168
We used chloroquine or hydroxychloroquine in 173 of 210 cases and found only one case of chorioretinopathy attributable to these drugs .
 Chemical: chloroquine; Chemical: hydroxychloroquine; Disease: chorioretinopathy
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: chloroquine; Chemical: hydroxychloroquine; Disease: chorioretinopathy