Comparison of the primary headache, COVID-19 headache, and COVID-19 immunization headache according to the phenotype in healthcare workers - Gonzalez-Martinez, A; Panos Basterra, P; Dominguez Gallego, M; Somovilla, A; Martin Ramos, C; Morales Caballero, A; Lopez Guerrero, A; Garcia Cebrian, M; Vivancos, J; Gago-Veiga, A B (JOURNAL OF HEADACHE AND PAIN, 2022)