2240
Furthermore , mouse embryonic fibroblasts required the presence of B16F0 cells to express Patched in a co - culture assay system .
 Anatomy: embryonic fibroblasts; Anatomy: B16F0 cells
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: embryonic fibroblasts; Anatomy: B16F0 cells