title: Secondary headache in emergency.
authors.affiliation: Institute of Neurology, Department of Applied Clinical Sciences and Biotechnology, University of L'Aquila, L'Aquila, Italy. a_carolei@yahoo.it.
authors.forename: Antonio
authors.initials: A
authors.lastname: Carolei
authors.affiliation: Institute of Neurology, Department of Applied Clinical Sciences and Biotechnology, University of L'Aquila, L'Aquila, Italy.
authors.forename: Patrizia
authors.initials: P
authors.lastname: Ripa