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Serum vascular endothelial growth factor ( VEGF ) levels were measured using the enzyme - linked immunosorbent assay ( ELISA ) kit .
 Anatomy: Serum
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Anatomy 
Text: {0} 
Answer:
 Anatomy: Serum