1. School of Physiotherapy, Faculty of Health Sciences, Universidad Francisco de Vitoria, 28223 Madrid, Spain
2. CranioSPain Research Group, Centro Superior de Estudios Universitarios La Salle, Universidad Autónoma de Madrid, 28023 Madrid, Spain
3. Headache Unit, Neurology Department, Hospital Universitario Fundación Jiménez Díaz, 28040 Madrid, Spain
4. Unidad de Fisioterapia, Hospital Universitario La Paz-Carlos III, IdiPAZ (Hospital La Paz Institute for Health Research), 28029 Madrid, Spain