CHI3L1 and Behcet disease: To assess the interplay between zinc levels and immune activation in BD, we measured serum levels of high‐sensitive C‐reactive protein (hsCRP) levels by immunoturbidimetric assay, and serum levels of monocyte chemoattractant protein‐1 (MCP‐1), chitinase 3‐like protein 1 (YKL‐40), and soluble cluster of differentiation 14 (sCD14) by electrochemiluminescence enzyme‐linked immunosorbent assays.