Mark I. Johnson is author of a book supporting TENS technology.<ref>Johnson, Mark I., Transcutaneous Electrical Nerve Stimulation (TENS): Research to support clinical practice, Oxford University Press, 2014, p. 272</ref>
[http://www.webmd.com/back-pain/news/20091230/tens-gets-thumbs-down-as-back-pain-treatment TENS Gets Thumbs Down as Back Pain Treatment]
== References ==