A2M and Behcet disease: The three most reported proteins were quantified in our results (when compared to HC) as following: APOA1 (BD: P = 1.07 × 10−2, SZ: P = 3.15 × 10−2), BDNF (BD: P = 9.22 × 10−3, SZ: P = 0.42), A2M (BD: P = 6.06 × 10−2, SZ: P = 7.69 × 10−2).