Laparotomy for fever.
D000740:Anemia / Q000150:complications; D001835:Body Weight; D001068:Feeding and Eating Disorders / Q000150:complications; D005334:Fever / Q000209:etiology*; D005335:Fever of Unknown Origin; D006801:Humans; D007813:Laparotomy / Q000009:adverse effects / Q000401:mortality; D013156:Splenectomy; D006113:United Kingdom; D014481:United States