2785
Until physicians began reporting an unusual acute flank pain syndrome to the spontaneous reporting system , 700 , 000 persons used the drug in the United States .
 Disease: flank pain
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: flank pain