Received: 3 April 2020
Accepted: 1 June 2020
First Online: 9 June 2020
Ethics approval and consent to participate
: The study protocol was reviewed and approved by the Ethical Committee of the University of Campania “Luigi Vanvitelli”. The study was conducted according to the ethical principles of the Declaration of Helsinki. Informed consent to participate in the study was obtained from all patients.
: Not applicable.
: Professor Russo has received speaker honoraria from Allergan, Novartis, Lilly and Teva and serves as an associate editor of Frontiers in Neurology (Headache Medicine and Facial Pain session). Professor Tessitore has received speaker honoraria from Novartis, Schwarz Pharma/UCB, Lundbeck, Abbvie and Glaxo. Professor Tedeschi has received speaker honoraria from Sanofi-Aventis, Merck Serono, Bayer Schering Pharma, Novartis, Biogen-Dompe´ AG; has received funding for travel from Bayer Schering Pharma, Biogen-Dompe´ AG, Merck Serono, Novartis and Sanofi Aventis; and serves as an associate editor of Neurological Sciences. The other authors have nothing to declare.