The following terms were included:
"Transkutane elektrische Nervenstimulation", "Transkutane Nervenstimulation", TENS, "transcutaneous electric nerve stimulation", "transcutaneous nerve stimulation", 経皮電気神経刺激, 経皮神経刺激
Infrared and Millimeter Waves, Conference Digest of the 2004 Joint 29th International Conference on 2004 and 12th International Conference on Terahertz Electronics, 2004, Karlsruhe, Germany. IEEE: 817-818; ISBN 978-0-7803-8490-3