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Article History

Received: 16 August 2021

Accepted: 6 September 2021

First Online: 17 September 2021

Declarations

:

: The study was conducted in accordance with Helsinki Declaration as revised in 2013. According to local IRB no ethical approval or informed patient consent was necessary because no new individually collected patient data were used in this study. For this type of study formal consent is not required.

: Not applicable.

: David García-Azorín received scientific support and received honoraria from the Brain Health Unit of the World Health Organization as scientific advisor for the COVID-19 Global Forum.Thien Phu Do reports no conflicts of interest.Andreas R. Gantenbein reports no conflicts of interest.Jakob Møller Hansen reports no conflicts of interest.Marcio Nattan Souza received speaker fees from Novartis, TEVA, Lilly, Allergan, Sanofi, Libbs and Lundbeck.Mark Obermann received scientific support, travel support and/or honoraria from Biogen Idec, Novartis, Sanofi/Genzyme, Pfizer, Teva, Lilly, Schwarz and Heel. He received research grants from Allergan, Electrocore, Heel, and the German Ministry for Education and Research (BMBF).Heiko Pohl was funded by the Werner Dessauer Stiftung and received speaker fees from TEVA Pharmaceuticals and honoraria from Eli Lilly.Christoph J. Schankin received scientific support, travel support and/or honoraria from Novartis, Eli Lilly, TEVA Pharmaceuticals, Allergan, Almirall, Amgen, MindMed, Grünenthal. He received research grants from German Migraine and Headache Society, Eye on Vision Foundation, and Baasch Medicus Foundation. He is part-time employee at Zynnon.Henrik Winther Schytz has received honoraria from Novartis, TEVA, Lilly and has received a research grant from Novartis.Alexandra Sinclair has received speaker fees and Honoraria from Novartis and Allergan.Guus Schoonman reports no conflict of interest.Espen Saxhaug Kristoffersen reports no conflicts of interest.