12370
To evaluate carrier efficacy , rhBMP - 2 and bovine articular chondrocytes were encapsulated within CS - BM , and biochemical evaluation revealed significant increases in total collagen production with rhBMP - 2 .
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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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