title: Letter: Selective IgA deficiency.
mesh_terms: D004406:Dysgammaglobulinemia; D006801:Humans; D007070:Immunoglobulin A; D007071:Immunoglobulin A, Secretory; D007153:Immunologic Deficiency Syndromes; D007239:Infections / Q000276:immunology
chemical_list: D007070:Immunoglobulin A; D007071:Immunoglobulin A, Secretory