1. Department of Physical Therapy Occupational Therapy, Rehabilitation and Physical Medicine Research Group of Humanities and Qualitative Research in Health Science of Universidad Rey Juan Carlos (Hum&QRinHS) Universidad Rey Juan Carlos Alcorcón Spain
2. Headache Unit Department of Neurology Hospital Clínico Universitario de Valladolid Valladolid Spain
3. Headache Unit Department of Neurology Hospital Clínico San Carlos Instituto de Investigación Sanitaria San Carlos (IdISSC) Madrid Spain
4. Department of Anesthesiology Hospital General de Segovia Segovia Spain
5. Institute of Biomedical Research of Salamanca (IBSAL) Salamanca Spain
6. Department of Medicine School of Medicine Universidad Complutense de Madrid Madrid Spain