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n a randomized controlled trial, the purpose of "double blinding" or "double masking" is to _______________________________________________________________________
| a. |
ensure that the participants are not aware as to whether they are in the treatment group or in the control group |
|
| b. |
ensure that the investigators are not aware of which participants are in the treatment group and who are in the control group |
|
| c. |
to ensure that the independent statisticians are also unaware of which participants are in the treatment group and who are in the control group |
|
| d. |
both a and b |
|
| e. |
both b and c |
|
| f. |
both a and c |
|
| g. |
all of the above |
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