21811
MATERIALS / METHODS : Thirty - three volunteers [ 16 female / 17 male , 16 normal - weight and 17 overweight / obese , 27 . 3 +/- 7 . 2 ( 19 - 44 ) y ] took part in this randomized , crossover study .
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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