1259
RESULTS : At a median follow - up of 14 . 1 months , the overall recurrence rate in the 51 patients was 3 . 9 % ( 2 / 51 ) .
 None
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:
 None