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Twenty - five patients with rheumatoid arthritis ( RA ) who developed toxicity while taking remission inducing drugs and 30 without toxicity were studied for possible associations with class I and II HLA antigens .
 Disease: rheumatoid arthritis; Disease: RA; Disease: toxicity; Disease: toxicity
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: rheumatoid arthritis; Disease: RA; Disease: toxicity; Disease: toxicity