1Department of Neurology, Leiden University Medical Center, Leiden, The Netherlands
2Department of Neuroscience, University Hospital San Giovanni Battista, Torino, Italy
3Department of Neurology, University of Pennsylvania, PA, USA
4Department of Clinical Medicine, University of Bergen, Bergen
5Department of Neurology, Haukeland University Hospital, Bergen, Norway
6Department of Neurology, Ospedale Ca' Foncello, Treviso, Italy
7Department of Neurology, Hospital Clinic, Universitat de Barcelona and Institut d’Investigació Biomèdica August Pi i Sunyer (IDIBAPS), Barcelona, Spain
8Department of Neurology, KFJ Hospital, Vienna, Austria
9Centre deRéférence Maladie Rare 'Syndromes neurologiques Paranéoplasiques' HospicesCivils de Lyon, 69677 Bron, France
10INSERM U842, Université Lyon1, UMR-S842 Lyon, France
11Department of Neurology, Erasmus University Medical Center, Rotterdam, The Netherlands
12Department of Neurology, Colentina Hospital, Carol Davila University of Medicine and Pharmacy, Bucharest, Romania
13Department of Palliative Medicine, University of Cologne, Cologne, Germany