In order to study the relationship between the α7-nAChR AAbs OD, the concentration of cytokines and the diagnosis by controlling confounding variables, we used a multiple linear regression and found that three cytokines (IL-4, IL-7, IL-15) are associated with α7-nAChR AAbs OD and that BD and SZ but not HC are associated to an increase in α7-nAChR AAbs OD (Supplementary Table 1). This evidence concerns the gene IL15 and Behcet disease.