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Paper published by Dr Zhengquan Ma:
Original Research
Risk factors predict frequent hospitalization in patients with acute exacerbation of COPD
Wei X, Ma ZQ, Yu N, Ren JT, Jin CW, Mi JY, Shi MJ, Tian LB, Gao YZ, Guo YM
International Journal of Chronic Obstructive Pulmonary Disease 2018, 13:121-129
Published Date: 27 December 2017