| Description | For the determination of autoantibodies to aquaporin-4 (AQP4) in serum | For the determination of autoantibodies to glutamic acid decarboxylase (GAD) in serum | For the determination of autoantibodies to titin (TitinAb) in serum | For the determination of autoantibodies to voltage-gated potassium channels (VGKC) in serum |