title: Laparotomy in the investigation of patients with pyrexia of unknown origin.
mesh_terms: D001466:Barium Sulfate; D001706:Biopsy; D005335:Fever of Unknown Origin / Q000209:etiology*; D006801:Humans; D010535:Laparoscopy; D007813:Laparotomy; D008220:Lymphography; D013997:Time Factors; D014057:Tomography, X-Ray Computed; D014463:Ultrasonography; D014567:Urography
chemical_list: D001466:Barium Sulfate