5792
We propose that circulating monocyte progenitors are derived from a common bone marrow osteoclasts / macrophage / dendritic cell progenitor ( OcMDC ) , which we have now characterized at a clonal level .
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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:
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