Abstract Background Congenital myasthenic syndromes (CMSs) are a group of inherited disorders of neuromuscular transmission that may be presynaptic. synaptic. or postsynaptic. Causative mutations have been identified in 4 breeds including the Labrador Retriever. https://www.ealisboa.com/mega-grab-Yocan-CubeX-Replacement-Coil-5pk-must-buy/