This double-blind, placebo-controlled study examined the effects of low-energy pulsed electromagnetic fields administered via soft collars on patients suffering from persistent neck pain. Results indicated significantly beneficial effects following three weeks of treatment.
D. Foley-Nolan, Low Energy High Frequency (27.12 MHZ) Therapy for Persistent Neck Pain. Double Blind Placebo Controlled Trial, Bioelectromagnetics Society, 12th Annual, June 10-14, 1990, San Antonia, TX, p. 73.