AGRN and myasthenia gravis: In this study, we did not analyse other potential autoantibodies of MG such as anti‐MuSK, anti‐Lrp4, anti‐agrin, anti‐ColQ, anti‐titin, anti‐ryanodine receptor or anti‐cortactin; therefore, the relationship between anti‐NRIP to these autoantibodies is still unclear.