Pham , T. Q.; Nguyen , T. H. N.; Nguyen , T. H.; Nguyen , M. C.; Do , T. H.; Nguyen , V. L. CHALLENGES IN DIAGNOSING FAMILIAL HEMOPHAGOCYTIC LYMPHOHISTIOCYTOSIS: THE ROLE OF T-CELL BIOMARKERS IN THE EARLY DIAGNOSIS OF HEREDITARY HLH. VMJ 2025, 550.