Etiological characteristics and treatment costs of inpatients with upper gastrointestinal bleeding in an A tertiary hospital in Beijing
PANG Min, LU Li-na, KUANG Zhe, GUO Hui-li
South China Journal of Preventive Medicine . 2022, (7): 808 -812 .  DOI: 10.12183/j.scjpm.2022.0808

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