DOI:
10.1055/s-00000012
Endoscopy
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References
Machlab S, Garcia-Iglesias P, Martinez-Bauer E. et al.
Diagnostic utility of nasogastric tube aspiration and the ratio of blood urea nitrogen to creatinine for distinguishing upper and lower gastrointestinal tract bleeding.
Emergencias 2018;
30: 419-423
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