Status investigation of chronic comorbidity status in elderly at tertiary hospitals and community hospitals
Zhang Xinhui, Gu Yumeng, Wang Zhongyan, Wang Donglai, Xia Xiaoshuang, Wang Lin, Liu Xia
Clinical Focus . 2021, (1): 39 -43 .  DOI: 10.3969/j.issn.1004-583X.2021.01.008