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Although biallelic mutations in non - collagen genes account for < 10 % of individuals with osteogenesis imperfecta , the characterization of these genes has identified new pathways and potential interventions that could benefit even those with mutations in type I collagen genes .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
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