RT Book, Section A1 Chin-Hong, Peter V. A1 Guglielmo, B. Joseph A2 Papadakis, Maxine A. A2 McPhee, Stephen J. A2 Rabow, Michael W. SR Print(0) ID 1175790952 T1 Fever of Unknown Origin (FUO) T2 Current Medical Diagnosis & Treatment 2021 YR 2021 FD 2021 PB McGraw-Hill Education PP New York, NY SN 9781260469868 LK accessmedicine.mhmedical.com/content.aspx?aid=1175790952 RD 2023/01/28 AB ESSENTIALS OF DIAGNOSISIllness of at least 3 weeks in duration.Fever over 38.3°C on several occasions.Diagnosis has not been made after three outpatient visits or 3 days of hospitalization.