Obergassel, Julius ; Lohmann, Lisa; Meuth, Sven ; Meuth, Sven G. ; Wiendl, Heinz ; Wiendl, H. ; Grauer, Oliver Martin ; Nelke, Christopher: An enigmatic case of cortical anopsia: Antemortem diagnosis of a 14-3-3 negative Heidenhain-variant MM1-sCJD