2736
Significantly more P9605 patients developed leukoencephalopathy compared with P9201 patients ( 68 % , 95 % confidence interval 49 % - 83 % vs . 22 % , 95 % confidence interval 5 % - 44 % ; P = 0 . 001 ) identified as late as 7 . 7 years after the end of treatment .
 Disease: leukoencephalopathy
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: leukoencephalopathy