Prevalence and Associated Factors of Preoperative Frailty in Elderly Patients with Knee Osteoarthritis Undergoing Surgery　
FANG Wen，WANG Xiuhong，WANG Junhua，JIANG Zhiyue，DONG Lianghong，LI Jing
Chinese General Practice . 2020, (30): 3839 -3845 .  DOI: 10.12114/j.issn.1007-9572.2020.00.126

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