Elizagaray-García, I.; Gil-Martínez, A.; Navarro-Fernández, G.; Navarro-Moreno, A. R.; Sánchez-de-Toro-Hernández, J.; Díaz-de-Terán, J.; Lerma-Lara, S. Inter, Intra-Examiner Reliability and Validity of Inertial Sensors to Measure the Active Cervical Range of Motion in Patients With Primary Headache. EXCLI J. 2021, 20, 879-893.