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A 2008 study published in the American Journal of Preventive Medicine showed that dieters who kept a daily food diary ( or diet journal ) , lost twice as much weight as those who did not keep a food log , suggesting that if a person records their eating , they are more aware of what they consume and therefore eat fewer calories .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
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