Distribution of copd comorbidities and creation of acute exacerbation risk score: Results from scicp

Haiyan Ge, Xuanqi Liu, Wenchao Gu, Xiumin Feng, Fengying Zhang, Fengfeng Han, Yechang Qian, Xiaoyan Jin, Beilan Gao, Li Yu, Hong Bao, Min Zhou, Shengqing Li, Zhijun Jie, Jian Wang, Zhihong Chen, Jingqing Hang, Jingxi Zhang, Huili Zhu