Fig. 2From: The cerebral mechanism of the specific and nonspecific effects of acupuncture based on knee osteoarthritis: study protocol for a randomized controlled trialSchedule of enrollment, intervention, and assessment. NRS, Numerical rating scale; WOMAC, Western Ontario and McMaster Universities Osteoarthritis Index; STAI-S, State-Trait Anxiety Scale-State Anxiety Subscale; SETS, Stanford Expectations of Treatment Scale; fMRI, functional magnetic resonance imagingBack to article page