Chinese expert consensus on assessment of cognitive impairment in the elderly oleh Xiushi Ni, Fang Wu, Juan Song, Lina An, Qianwen Jiang, Tingting Bai, Jianye Wang, Pulin Yu, Cuntai Zhang, Jinhui Wu, Geriatrics Branch of the Chinese Medical Association, Expert Group of the Chinese Expert Consensus on Assessment of Cognitive Impairment in the Elderly