Neck-Shoulder Region Training for Chronic Headache in Women: A Randomized Controlled Trial.

"The author(s) declared no potential conflicts of interest with respect to the research, authorship, and/or publication of this article."

"Funding: The author(s) disclosed receipt of the following financial support for the research, authorship, and/or publication of this article: This trial was supported by a grant from the Social Insurance Institution of Finland (36/26/2011)."

"We conducted a 6-month randomized controlled trial at two centers (UKK Institute, Tampere, Finland, and Metropolia University of Applied Sciences, Helsinki, Finland) from October 2012 to June 2013. The trial design has been published elsewhere. The trial was approved by the Ethics Committee of Pirkanmaa Hospital District, Finland in January 2012 (Code R12006) and was prospectively registered at ClinicalTrials.gov (NCT01664585). The study was conducted according to the guidelines of the Declaration of Helsinki. All participants signed a written informed consent form. They were informed that they would be participating in a physical therapy study for in which they would be randomized either to the neck–shoulder region training group or to the group administered transcutaneous electrical nerve stimulation treatment, for 6 months."