Abolishing the 1‐year rule: How much evidence will be enough?

Department of Neurology, Montreal General Hospital, Montreal, Quebec, Canada Department of Neurodegeneration, Hertie-Institute for Clinical Brain Research and German Center for Neurodegenerative Diseases, Tuebingen, Germany Penn Neurological Institute, Philadelphia, Pennsylvania, USA Department of Neurology, Innsbruck Medical University, Innsbruck, Austria Department of Neurology, The Mount Sinai Hospital, New York, New York, USA Department of Neurology, Philipps University of Marburg, Marburg, Germany Institute for Neurodegenerative Disorders, New Haven, Connecticut, USA Department of Neurosciences, UC San Diego, La Jolla, California, USA Division of Neurology, Toronto Western Hospital, Toronto, Ontario, Canada Neuroscience Research Australia & University of NSW, Randwick, Australia Rush University Medical Center, Chicago, Illinois, USA Hopital De La Salpetriere, Paris, France Xuanwu Hospital of Capitol of Medical University, Beijing, People’s Republic of China Department of Neurology, Radboud university medical center, Donders Institute for Brain, Cognition and Behaviour, Nijmegen, Netherlands The Parkinson’s Disease and Movement Disorders Center, Department of Neurology, Mayo Clinic, Scottsdale, Arizona, USA Department of Neurology, Christian-Albrechts University, Kiel, Germany