title: Prolonged fever of unknown origin: a record of experiences with 54 childhood patients.
mesh_terms: D000293:Adolescent; D000367:Age Factors; D002648:Child; D002675:Child, Preschool; D003095:Collagen Diseases / Q000175:diagnosis; D003937:Diagnosis, Differential; D005260:Female; D005335:Fever of Unknown Origin / Q000175:diagnosis* / Q000209:etiology; D005500:Follow-Up Studies; D006801:Humans; D007223:Infant; D007239:Infections / Q000175:diagnosis; D008297:Male; D009369:Neoplasms / Q000175:diagnosis