Transcatheter patent foramen ovale closure mitigates aura migraine headaches abolishing spontaneous right-to-left shunting - Giardini, A; Donti, A; Formigari, R; Salomone, L; Prandstraller, D; Bonvicini, M; Palareti, G; Guidetti, D; Gaddi, O; Picchio, FM (Am Heart J, 2006)