Long-term efficiency of pallidal DBS and the role of Levodopa treatment in DYT-GNAL and 18p deletion syndrome associated dystonia: an observational study and review of literature Johanna Reimer, Friederike Schumann, Katja Lohmann, Thomas G. Riemer, Joachim K. Krauss, Gerd-Helge Schneider, Andrea A. Kühn, Patricia Krause Journal of Neural Transmission.2026;[Epub] CrossRef