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Article History

Received: 17 July 2020

Accepted: 22 September 2020

First Online: 6 October 2020

Ethics approval and consent to participate

: The study was approved by the independent ethics committee or institutional review board for each study site. All clinical work was conducted in compliance with current Good Clinical Practices as referenced in the International Conference on Harmonisation of Technical Requirements for Registration of Pharmaceuticals for Human Use guidelines, local regulatory requirements, and the principles of the Declaration of Helsinki. All patients enrolled in the study provided written informed consent prior to their participation.

: Not applicable.

: SS: Receives or has received, as a consultant and/or advisory panel member, honoraria from Allergan, Amgen, Avanir Pharmaceuticals, Cefaly, Curelator, Dr. Reddy’s Laboratories, Egalet Corporation, electroCore Medical, eNeura, Lilly USA, Lundbeck Seattle Biopharmaceuticals, Medscape, National Institute of Neurological Disorders and Stroke, Satsuma Pharmaceuticals, Supernus Pharmaceuticals, Teva Pharmaceuticals, Theranica, and Trigemina, and reports consulting fees from Alder, Allergan, Amgen, Avanir, Curelator, Dr. Reddy’s Laboratories, electroCore, Eli Lilly, eNeura, Medscape, National Institute of Neurological Disorders and Stroke, Supernus, Teva, Theranica, and Trigemina.MD: Advisory boards and a consultant for Amgen, Lundbeck Seattle Biopharmaceuticals, Promius Pharma, Teva Pharmaceutical Industries; advisory boards for Avanir Pharmaceuticals, Depomed, Eli Lilly, Supernus Pharmaceuticals, Upsher-Smith Laboratories; speakers’ bureaus for Amgen, Avanir Pharmaceuticals, Depomed, Pernix Therapeutics, Supernus Pharmaceuticals, Teva Pharmaceutical Industries; Board of Directors for the National Headache Foundation and the Diamond Headache Clinic Research and Educational Foundation.NAH: Serves on speaker’s bureaus for Amgen, Eli Lilly, and electroCore, and serves on advisory boards for Amgen, Eli Lilly, Lundbeck Chicago Biopharmaceuticals, and Zosano Pharma.DB: Full-time employee of Alder BioPharmaceuticals (currently known as Lundbeck Seattle BioPharmaceuticals) at the time of the study; Contracted service provider during manuscript development.RC: Full-time employee of Lundbeck Seattle BioPharmaceuticals.JH: Contracted service provider of biostatistical resources to Lundbeck Seattle BioPharmaceuticals.BA: Full-time employee of Alder BioPharmaceuticals (currently known as Lundbeck Seattle BioPharmaceuticals) at the time of the study; Contracted service provider during manuscript development.SP: Full-time employee of Lundbeck Seattle BioPharmaceuticals.BS: Full-time employee of Lundbeck Seattle BioPharmaceuticals at the time of the study and during manuscript development.JS: Full-time employee of Alder BioPharmaceuticals (currently known as Lundbeck Seattle BioPharmaceuticals) at the time of the study; Contracted service provider during manuscript development.