Central South University - Department of Thoracic Surgery, Central South University - Department of Cardiovascular Surgery, Central South University - Department of Respiratory Medicine, Central South University - Department of Cardiology, Central South University - Department of Radiology, Central South University - ICU Center, Central South University - Department of Critical Care Medicine, The First Hospital of Changsha - Department of Critical Care Medicine, The First Hospital of Changsha - Department of Critical Care Medicine, The First Hospital of Changsha - Department of Critical Care Medicine, The First Hospital of Changsha - Department of Critical Care Medicine, The First Hospital of Changsha - Department of Critical Care Medicine, Central South University - Department of Thoracic Surgery and Central South University - Department of Respiratory Medicine