Inclusion Criteria:  Suspected patients with myasthenia gravis present the clinical features of GMG(Generalized Myasthenia Gravis, GMG) or OMG(Ocular Myasthenia Gravis, OMG) need to be confirmed by serum antibody testing.  Exclusion Criteria:  Abnormal serum samples, such as hemolysis or lipemia, which will affect the detection base value and the final interpretation of CBA, CBA-TSA, RIPA and ELISA; The samples with incomplete clinical data, which will affect the disease characterization.