Footnotes

• Contributors All coauthors have read and approved the submitted manuscript.

• Funding The authors have not declared a specific grant for this research from any funding agency in the public, commercial or not-for-profit sectors.

• Competing interests RS-A reports no dislosures. JM-G reports personal fees and non-financial support from Otsuka and Angelini over the past year. JG-C reports no disclosures. CM reports no disclosures. AAC has received travel grants from Abbvie, Italfarmaco and Zambon, consultancies from Ipsen and speaker honoraria from Ipsen and Zambon. JCMC has received research support from Lundbeck, Italfarmaco, Allergan, Zambon, Merz and Abbvie. He has received speaking honoraria from AbbVie, Bial, Italfarmaco, Lundbeck, Krka, TEVA, UCB, Zambon, Allergan, Ipsen and Merz. MJE does medical expert reporting in personal injury and clinical negligence cases, including in cases of functional neurological disorder (FND). MJE has shares in Brain & Mind, which provides neuropsychiatric and neurological rehabilitation in the independent medical sector, including in people with functional neurological disorder. MJE has received financial support for lectures from the International Parkinson’s and Movement Disorders Society and the FND Society (FNDS). MJE receives royalties from Oxford University Press for his book The Oxford Specialist Handbook of Parkinson’s Disease and Other Movement Disorder. MJE has received honoraria for medical advice to Teva Pharmaceuticals. MJE receives grant funding, including for studies related to FND, from the National Institute for Health and Care Research (NIHR) and the Medical Research Council (MRC). MJE is an associate editor of the European Journal of Neurology. MJE is a member of the international executive committee of the International Parkinson’s and Movement Disorders Society and a board member of the FNDS. MJE is on the medical advisory boards of the charities FND Hope UK and Dystonia UK. DH-H reports personal fees and non-financial support from Janssen and Otsuka. IP has received honoraria as a speaker in scientific meetings from Zambon, Abbvie, Exeltis Healthcare SL Sociedad Extremeña de Neurología, Sociedad Española de Neurología and travel support for scientific meetings from Esteve.

• Provenance and peer review Not commissioned; internally peer reviewed.