RAPSN and myasthenia gravis: We selected the four NMJ genes which encode known antigens for autoantibodies in MG (AGRN, CHRNA1, LRP4, MUSK) and four other NMJ genes involved in maintaining NMJ neurotransmission and where mutations can cause CMS (acetylcholine esterase (ACHE), collagen Q (COLQ), downstream of kinase‐7 (DOK7), and rapsyn (RAPSN)) (Table 1) (Engel, 2018).