Using the XGBoost‐based model, key biomarkers including F11, ITIH4, SERPINA3, APMAP, ORM1, LRG1, ITIH3, FN1, FGL1, FCN3, C1QA, C5, PLTP, TPM3, and IGKV3‐64D were identified as critical variables for BD diagnosis (Figure 2C,D). Here, FN1 is linked to Behcet disease.