“OC-03 | Transcranial magnetic stimulation in patients with chronic migraine and medication overuse headache: Elisa Maria Piella,1 Fabio Ferrandes,1 Gianluca Isoardo,1 Alberto Mario Chiarandon,1 Fausto Roveta,1 Alessia Agostinelli,1 Elisa Rubino,1,2 Innocenzo Rainero,1,2 | 1Department of Neuroscience ‘Rita Levi Montalcini’, University of Turin; 2Headache Center, Department of Neuroscience and Mental Health, AOU Città della Salute e della Scienza di Torino, Turin, Italy” (2025) Confinia Cephalalgica, 35(S1). doi:10.4081/cc.2025.15800.