Affiliation: | 1. Urinary Lithiasis Metabolism Service, Medical School of Botucatu - UNESP, Botucatu, SP, 18618-970, Brazil 2. Department of Urology, Medical School of Botucatu, UNESP, Botucatu, SP, Brazil 3. Nuffield Department of Surgical Sciences, University of Oxford, Oxford, UK 4. Department of Biostatistics, Medical School of Botucatu, UNESP, Botucatu, SP, Brazil
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