| 单词 | double blinded study | 
| 释义 | double blinded studydouble blinded studyDouble-masked design Clinical research A clinical trial in which neither the Pt nor the researcher know which arm–eg a gold standard therapy, an experimental, or placebo–of the study the Pt has been placed, preventing, theoretically, Pt or researcher bias. See Bias, Blinding, Triple blinding; Cf Anecdotal. | 
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