Effectiveness and safety of pulsed radiofrequency in patients with chronic and refractory trigeminal neuralgia and cluster headache - Gonzalez-Martinez, A; Dominguez Gallego, M; Quinta, S; Montero Grande, C; Rojo, E; Munoz, M; Ochoa, D; Perez, C; Vivancos, J; Gago-Veiga, A B (JOURNAL OF HEADACHE AND PAIN, 2022)