The results of IVW showed that six inflammatory cytokines were associated with the risk of MG, including adenosine deaminase (ADA), CD40 Ligand‌ (CD40L), interleukin-1-alpha (IL-1α), glial-cell-line-derived neurotrophic factor (GDNF), Osteoprotegerin (OPG) and tumor necrosis factor-beta (TNF-β) (Supplementary Table 3, Fig. 2). Here, GDNF is linked to myasthenia gravis.