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EK received honoraria from the companies EISAI GmbH, Germany, memodio GmbH, Germany, Desitin GmbH, Germany, and Prolog GmbH, Germany, all outside the submitted work.JK is a consultant and speaker for AbbVie, Bial, Biogen, Desitin, Esteve, Merz, Mitsubishi Tanaka, Roche, Stada, UCB Pharma, and Zambon; in addition, he is Specialty Chief Editor for Frontiers in Neurology (section Applied Neuroimaging) and Associate Editor (Neurology) for Therapeutic Advances in Chronic Disease. ILS reports funding from Parkinson Stiftung and travel grants from Desitin and the German Society for Neurology outside the submitted work.KW receives funding from the Deutsche Forschungsgemeinschaft (German Research Association) and STADAPHARM GmbH outside the present study. He has received honoraria for presentations\/advisory boards\/consultations from BIAL, Indorsia, Boston Scientific and STADAPHARM GmbH, outside the present study. He has received royalties from Thieme Press and Elsevier Press. He serves as an editorial board member of Wileys \u201cParkinson\u2019s Disease\u201d, \u201cBehavioral Neurology\u201d and PLOSone. MKD is supported by a VENI grant of the Netherlands Organisation for Scientific Research (NWO) VI.Veni.221G.017.","order":1,"name":"Ethics","group":{"name":"EthicsHeading","label":"Competing interests"}}],"article-number":"86"}}