3287
Almost all the dose ( 98 . 2 % ) was recovered within 168 h : 73 . 2 % in urine and 25 . 0 % in faeces .
 None
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 None