NRGN and Behcet disease: Further, we included several explorative analyses to investigate the associations between biomarkers (Aβ40, Aβ38, sAPPα, sAPPβ, t-tau, p-tau, p-tau /t-tau, NF-L and NG in CSF, Aβ42, Aβ40, Aβ42/38, Aβ42/40, t-tau, p-tau, p-tau /t-tau and NF-L in plasma and S100B in serum) and cognitive function (global cognition, verbal memory, psychomotor speed, sustained attention, and executive function) in BD and HC jointly.