Multimodal MRI of episodic cluster headache reveals frontal cortical alterations and network-level connectivity changes. - Caramia F; Di Renzo A; Giardina I; Chiffi D; Giuliani G; Sebastianelli G; Casillo F; Abagnale C; Conti F; Lafavia F; Fiorelli M; Song MM; et al. (The journal of headache and pain, 2026)