Acknowledgments
This work was supported by the Graduate Research Training Program on Cognitive Neurobiology of the Deutsche Forschungsgemeinschaft (DFG) at the University of Tübingen, the University and Science Program of the Federal State of Baden-Württemberg, and the Käthe Kluth Program of the University of Greifswald. The authors thank all patients for their participation in this study. The authors declare that they have no conflict of interest.