Moreover, cytotoxic T lymphocyte correlated antigen‐4 (CTLA4) gene, the human leukocyte antigen (HLA) gene, the cholinergic receptor nicotinic alpha 1 (CHRNA1) gene, and the protein tyrosine phosphatase nonreceptor type 22 (PTPN22) gene participate in MG development [4, 5, 6]. Here, CHRNA1 is linked to myasthenia gravis.