No abstract available
MeSH terms
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Abdominal Pain / etiology*
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Child, Preschool
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Emergency Service, Hospital
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Humans
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Hydronephrosis / diagnosis
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Hydronephrosis / etiology
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Kidney Pelvis / diagnostic imaging
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Male
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Radiography
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Ultrasonography
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Ureteral Obstruction / complications
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Ureteral Obstruction / diagnosis*
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Ureteral Obstruction / diagnostic imaging