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Chinese Journal of Oncology Prevention and Treatment
Statistical analysis of malignant tumors based on elderly hospitalized patients in the tertiary A-level hospital in Beijing from 2009 to 2017
SONG Peng, LIU Miao, CHE Herbin, ZHANG Dong
Chinese Journal of Oncology Prevention and Treatment . 2020, (3): 323 -327 .  DOI: 10.3969/j.issn.1674-5671.2020.03.15