21060
The study was based on a subgroup ( n = 273 ) of the national survey Riksmaten 2010 - 2011 ( 4 - day food records and questionnaire ) .
 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