1 Department of Thoracic Surgery, Yan'an Hospital of Kunming City, Kunming, 650051, China.
2 First Department of Thoracic Surgery, The First Affiliated Hospital of Kunming Medical University, Kunming, 650031, China.
3 Second Department of Cardiology, The First Affiliated Hospital of Kunming Medical University, Kunming, 650031, China.
4 Second Department of Thoracic Surgery, The First Affiliated Hospital of Kunming Medical University, Kunming, 650031, China. Electronic address: liuyinqiangxwk@163.com.