European Headache Federation (EHF) consensus on the definition of effective treatment of a migraine attack and of triptan failure

Simona Sacco^*, Christian Lampl, Faisal Mohammad Amin, Mark Braschinsky, Christina Deligianni, Derya Uludüz, Jan Versijpt, Anne Ducros, Raquel Gil-Gouveia, Zaza Katsarava, Paolo Martelletti, Raffaele Ornello, Bianca Raffaelli, Deirdre M Boucherie, Patricia Pozo-Rosich, Margarita Sanchez-Del-Rio, Alexandra Sinclair, Antoinette Maassen van den Brink, Uwe Reuter