Naka, A., Keilani, M., Loefler, S., & Crevenna, R. (2013). Does transcutaneous electrical nerve stimulation (TENS) have a clinically relevant analgesic effect on different pain conditions? A literature review. European Journal of Translational Myology, 23(3), 95–104. https://doi.org/10.4081/ejtm.2013.1779