CD40LG and psychiatric disorder: None of the final HC (mean age: 39.8 ± 12.8, 11 females/10 males, IgG = 9 ± 3 kU/l, IgM = 11 ± 3 kU/l, IgA < the detection capability of the method 5 kU/l in 20 patients, in 1 patient IgA = 8.8 kU/l) had any history of neurological or mental disorders.