title: Letter: Sudden-infant-death syndrome and immunodeficiency.
mesh_terms: D006801:Humans; D007071:Immunoglobulin A, Secretory; D007153:Immunologic Deficiency Syndromes / Q000150:complications*; D007223:Infant; D013398:Sudden Infant Death / Q000209:etiology*
chemical_list: D007071:Immunoglobulin A, Secretory