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Two types of responses were compared after a single MP dose (40 mg bolus) and a divided regimen (20 mg bolus and a 5 mg bolus 8 hours later) in six healthy male volunteers .
 None
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: cell line, protein, RNA, DNA, cell type 
Text: {0} 
Answer:
 None