1. From the Department of Neurology (C.P.M., P.-B.V., K.F., J.-P.C., J.-C.G.A.), University Hospital of Saint-Etienne; Synaptopathies and Autoantibodies (SynatAc) Team (C.P.M., Y.T., L.-D.D., S.M.-C., V.R., K.F., C.L.M., J.H., J.-P.C., J.-C.G.A.), Institut NeuroMyoGène, MELIS, INSERM U1314/CNRS UMR 5284, Université Claude Bernard Lyon 1; Faculty of Medicine (C.P.M., Y.T., J.-P.C., J.-C.G.A.), University Jean Monnet, Saint-Étienne, Saint-Priest-en-Jarez; Department of Biochemistry (Y.T., C.L.M.),...