1505
After 21 days , the serum concentration of nitrite , capillary density and expression of HIF1alpha were determined .
 Anatomy: serum; Anatomy: capillary
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; Anatomy: capillary