title: Letter: Fever of undetermined origin in Cairo.
mesh_terms: D003095:Collagen Diseases / Q000150:complications; D004534:Egypt; D005335:Fever of Unknown Origin / Q000175:diagnosis* / Q000209:etiology; D006801:Humans; D007239:Infections / Q000150:complications; D009369:Neoplasms / Q000150:complications