ZIA ZIABARI, Seyyed Mahdi; RIMAZ, Siamak; SHAFAGHI, Afshin; SHAKIBA, Maryam; POURKAZEMI, Zahra; KARIMZADEH, Elnaz; AMOUKHTEH, Melika. Blood Urea Nitrogen to Creatinine ratio in Differentiation of Upper and Lower Gastrointestinal Bleedings; a Diagnostic Accuracy Study. Archives of Academic Emergency Medicine, [S. l.], v. 7, n. 1, p. e30, 2019. DOI: 10.22037/aaem.v7i1.400. Disponível em: https://journals.sbmu.ac.ir/aaem/index.php/AAEM/article/view/400. Acesso em: 8 jul. 2026.