Co-existence of COPD and bronchiectasis: a risk factor for a high ratio of main pulmonary artery to aorta diameter (PA:A) from computed tomography in COPD patients

Shuang Dou1 Department of Pulmonary Medicine, Qilu Hospital, Shandong University, Jinan, People’s Republic of China

Chunyan Zheng1 Department of Pulmonary Medicine, Qilu Hospital, Shandong University, Jinan, People’s Republic of China

Xiuli Ji2 Department of Pulmonary Disease, Jinan Traditional Chinese Medicine Hospital, Jinan, People’s Republic of China

Wei Wang1 Department of Pulmonary Medicine, Qilu Hospital, Shandong University, Jinan, People’s Republic of China

Mengshuang Xie1 Department of Pulmonary Medicine, Qilu Hospital, Shandong University, Jinan, People’s Republic of China

Liwei Cui1 Department of Pulmonary Medicine, Qilu Hospital, Shandong University, Jinan, People’s Republic of China

Wei Xiao1 Department of Pulmonary Medicine, Qilu Hospital, Shandong University, Jinan, People’s Republic of ChinaCorrespondence[email protected]

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