2795
Although no changes in vascularity were detected 3 days after loading , treatment - related downregulation of angiogenic ( Pecam1 ) and osteogenic ( Bsp , Osx ) genes was observed at this early time point .
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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