3240
This percentage decreased to 45 . 45 , 44 . 4 , and 14 . 28 % at 1 year , 2 years , and 3 years postimplant , respectively .
 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