Effect of nutritional risk on cognitive function in patients with chronic obstructive pulmonary disease oleh Yiben Huang, Jiedong Ma, Bingqian Jiang, Naiping Yang, Fangyi Fu, Xianjing Chen, Chunyan Liu, Xiaqi Miao, Huanhuan Mao, Rongrong Zheng, Jianing Wang, Keke Ding, Xiaodiao Zhang