22030
By optimizing the use of duplex specific nuclease ( DSN ) to remove ribosomal RNA reads from stranded barcoded libraries , we demonstrate improved efficiency of multiplexed next generation sequencing ( NGS ) .
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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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