Myasthenia GravisDiplopiaPyridostigmine BromideOcular Motility DisordersBlepharoptosisMyasthenia Gravis, Autoimmune, ExperimentalEye ManifestationsThymectomyReceptors, CholinergicThymomaThymus NeoplasmsThymus HyperplasiaMyasthenia Gravis, NeonatalAutoantibodiesEdrophoniumCholinesterase InhibitorsPlasmapheresisNeostigmineTorpedoNeuromuscular JunctionRats, Inbred LewThymus Gland