作者单位：Pediatric Emergency Unit, Sapienza University of Rome, Azienda Policlinico Umberto i, 00161 Rome[1]Pediatric Radiology Unit, Sapienza University of Rome, Azienda Policlinico Umberto i, 00161 Rome[2]Department of Pediatrics, Pediatric Gastroenterology and Liver Unit, Sapienza University of Rome[3]
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