Application of Blood Urea Nitrogen /Creatinine Ratio in the Differentiation and Diagnosis of Upper and#br# Lower Gastrointestinal Bleeding
Li Yinghua, Wang Anxiu, Wu Yuhuai, Liu Jianping, Yang Yaopeng
Journal of Dali University . 2020, (2): 80 -83 .  DOI: 10. 3969 / j. issn. 2096-2266. 2020. 02. 018