Fig. 2From: Comparison of the effectiveness between transcutaneous electrical nerve stimulation, manual acupuncture, and electroacupuncture on tinnitus: study protocol for a randomized controlled trialStudy design flow chart. THI tinnitus handicap inventory, VAS visual analogue scale, PTA pure tone audiometry, SD speech discrimination, HRV heart rate variability, TENS transcutaneous electrical nerve stimulation, MA manual acupuncture, EA electroacupunctureBack to article page