Fig. 1
From: Acupuncture for primary fibromyalgia: Study protocol of a randomized controlled trial
The comparison of acupuncture treatment and sham acupuncture. a real acupuncture. b sham acupuncture.1. Needle handle. 2. Needle body. 3. Adhesive pad. 4. Skin. 5.Sharp tip. 6. Blunt tip. Needles: Both real and sham needles (Shanghai Zhenkang Medical Technology Company, Ltd., Shanghai, China) are stainless-steel needles, which have the same size of 0.30 × 40 mm according to the depth of acupoints’ site in this trial