aDINOGMI, University of Genoa, Genova, Italy
bSant Pau Hospital, Universitat Aut‘onoma de Barcelona, CIBERNED, Barcelona, Spain
cDepartment of Neurology, AZ St-Jan Brugge-Oostende AV, Campus Brugge, Brugge & Ghent University Hospital, Ghent, Belgium
dBiocruces Research Institute, Barakaldo, Spain
eDepartment of Neurology, Cantonal Hospital St.Gallen, Switzerland
fFairfield General Hospital, Bury, Greater Manchester, UK
gParkinson Center, University Policlinico Tor Vergata, Roma, Italy
hDepartment of Neurology, University of Muenster, Muenster, Germany
iParkinson-Klinik Ortenau, University of Freiburg, Wolfach, Germany