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Article History

Received: 7 April 2020

Accepted: 7 June 2021

First Online: 30 November 2021

Competing interests

: The author declares no competing interests. The disclosures of the authors are: F. Valldeoriola has received honoraria for speaking services and advisory boards from AbbVie, Zambon, Teva, Medtronic, and Boston Scientific. M.J. Catalán has received honoraria for consulting, advisory services, speaking services, and research from AbbVie Laboratories and Merz. F. Escamilla-Sevilla has received honoraria for advisory services, consulting, lecturing, support in assisting scientific meetings, and research from AbbVie, Italfarmaco, Medtronic, Merz, Teva, UCB Pharma, and Zambon. E. Freire has received honoraria from AbbVie, UCB, Zambon, Bial, and Eisai. J. Olivares has received honoraria in 2016 from AbbVie, UCB, Zambon, Teva, and Eisai. E. Cubo has received honoraria from AbbVie and Zambon. D. Santos Garcia has received honoraria from AbbVie, UCB Pharma, Teva, Zambon, KRKA, and Lundbeck. M. Calopa has received honoraria from AbbVie and Zambon. P. Martínez-Martín has received honoraria from National School of Public Health (ISCIII), Britannia, and Editorial Viguera for lecturing in courses; International Parkinson and Movement Disorder Society for management of the Program on Rating Scales; Bial, and Zambon for advice in clinical-epidemiological studies. Financial support by the International Parkinson and Movement Disorder Society for attending the IPMDS International Congress 2019. Grant for Research: International Parkinson and Movement Disorder Society, for development and validation of the MDS-NMS. J.C. Parra is an employee of AbbVie and holds AbbVie stock and/or stock options. G. Arroyo is an employee of AbbVie. J.M. Arbelo has received honoraria from AbbVie, Zambon, Bial, and Teva.