Functional comorbidity in Parkinson disease: A window of opportunity.

Competing Interests: Declaration of competing interest The authors declare the following financial interests/personal relationships which may be considered as potential competing interests: Monica M Kurtis reports a relationship with Bial, Zambon, World Parkinson Coalition and the Movement Disorders Society that includes: speaking and lecture fees. Monica M Kurtis reports a relationship with Bial and Gondola Medical Technologies that includes: consulting or advisory. Monica M Kurtis reports a relationship with QuironSalud and Horizon 2023 that includes: funding grants. Isabel Pareés reports receving honoraria as speaker in scientific meetings from Exeltis Healthcare and Zambon. Isabel Pareés reports a relationship with AbbVie, Zambon and Esteve that includes: support to travel and attend meetings.