It is difficult to blind acupuncturists in acupuncture clinical trials. However, it is feasible to conceal the patients and group assignments from outcome assessors and statistical analysts. Patients are told that they will receive one of 2 effective acupuncture interventions after enrollment, and during the acupuncture treatment, patients in different groups will be in separate compartments to avoid communication. Outcome assessors and statisticians will be blind to the group allocations.
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