1. Department of Ophthalmology Inselspital, Bern University Hospital and University of Bern Bern Switzerland
2. Department of Neurology Inselspital, Bern University Hospital and University of Bern Bern Switzerland
3. Graduate School for Cellular and Biomedical Sciences University of Bern Bern Switzerland
4. Department of Neurology St. Josef‐Hospital Ruhr‐University Bochum Huntington Center NRW Bochum Germany
5. Department of Neuropsychiatry Huntington Center South kbo‐Isar‐Amper‐Klinikum, Taufkirchen (Vils) Germany
6. Institute of Neuroradiology St. Josef‐Hospital Ruhr‐University Bochum Bochum Germany