1068
In the analysis of the combined data , average similarities of lipidomics profiles were highest between monozygotic ( MZ ) cotwins , and became progressively lower between dizygotic ( DZ ) cotwins , among sex - matched nontwin siblings and among sex - matched unrelated participants , respectively .
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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