3229
However , neither hypoxia nor hyperoxia significantly altered chondrogenesis or osteogenesis during early stages of fracture healing , and infiltration of macrophages and neutrophils was not affected by environmental oxygen after bone injury .
 Chemical: oxygen
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: oxygen