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Little P, Merriman R, Turner S, Rumsby K, Warner G, Lowes J A et al.
Presentation, pattern, and natural course of severe symptoms, and role of antibiotics and antibiotic resistance among patients presenting with suspected uncomplicated urinary tract infection in primary care: observational study
BMJ 2010; 340 :b5633
doi:10.1136/bmj.b5633