title: Alteration of T-lymphocyte subpopulations in children, youth and adults with hemophilia A.
mesh_terms: D000163:Acquired Immunodeficiency Syndrome / Q000276:immunology; D000293:Adolescent; D000328:Adult; D002648:Child; D002675:Child, Preschool; D006467:Hemophilia A / Q000276:immunology*; D006801:Humans; D007223:Infant; D007958:Leukocyte Count; D008297:Male; D013601:T-Lymphocytes / Q000276:immunology*