Investigation of symptom clusters and sentinel symptoms in patients with acute exacerbation of chronic obstructive pulmonary disease
CHEN Qingmei, CUI Miaoling, MA Yuee, JIANG Diandian, CAI Mengqian
Chinese Journal of Nursing . 2022, (23): 2891 -2897 .  DOI: 10.3761/j.issn.0254-1769.2022.23.011