title: Letter: Immunodeficiency and steely hair.
mesh_terms: D001927:Brain Diseases / Q000209:etiology / Q000235:genetics / Q000276:immunology; D006130:Growth Disorders / Q000209:etiology / Q000276:immunology; D006197:Hair; D006801:Humans; D007153:Immunologic Deficiency Syndromes / Q000150:complications*; D007223:Infant; D008607:Intellectual Disability / Q000209:etiology / Q000276:immunology; D013577:Syndrome; D013601:T-Lymphocytes / Q000276:immunology