GFPT1 and congenital myasthenic syndrome: In addition, whether electrodiagnostic features of high-frequency RNS are specific features of some CMS subtypes (such as patients with GFPT1-related CMS in our study or patients with RAPSN-related CMS in the study by LoRusso and Iyadurai) and helpful for diagnosis deserved to be further studied, which were also greatly significant in our study.