CONFLICT OF INTEREST
D.W.
FOX
S.B. has ownership interest in Neurostar GmbH (not related to this work). A.G. was supported by research grants (not related to this work) from Medtronic, Boston Scientific, Abbott, the Baden-Wuerttemberg Foundation, and the German Federal Ministry of Education and Research. D.W. has received research support from the German Research Council and the Michael J. Fox Foundation (not related to this work). L.M. has received honoraria from Medtronic (nor related to this work). G.N., I.C. have no conflicts of interest to report.