title: Sirkka-Liisa Leinonen.
authors: Department of Clinical Neurosciences, UCL Institute of Neurology, London, UK. a.schapira@ucl.ac.uk.
authors: A H V
authors: AH
authors: Schapira
authors: Department of Neurology, Istituto Neurologico Carlo Besta, Milano, Italy.
authors: A
authors: http://orcid.org/0000-0002-5864-0006
authors: A
authors: Albanese
authors: Center Clinical Neurosciences, Danube University, Krems, Austria.
authors: M
authors: M
authors: Brainin
authors: Neuroscience Department, Royal Free Hospital, London, UK.
authors: C
authors: C
authors: Davie
authors: Department of Clinical Neurosciences, University of Helsinki, Helsinki, Finland.
authors: S
authors: S
authors: Juvela
authors: Clinica Neurologica, IRCSS Casa Sollievo della Sofferenza, San Giovanni Rotondo, Italy.
authors: M
authors: http://orcid.org/0000-0002-6339-5738
authors: M
authors: Leone
authors: Department of Neurology, Mayo Clinic, Jacksonville, FL, USA.
authors: J
authors: J
authors: Meschia
authors: Duodecim Medical Journal, Helsinki, Finland.
authors: P
authors: P
authors: Saloheimo
authors: Department of Neurology, Singapore General Hospital, Singapore City, Singapore.
authors: E-K
authors: EK
authors: Tan
authors: Department of Neurology, Mayo Clinic, Jacksonville, FL, USA.
authors: Z
authors: Z
authors: Wszolek