1. Department of Cardiothoracic Surgery, Nanjing Hospital of Chinese Medicine, Nanjing, People's Republic of China
2. Department of Thoracic Surgery, the First Affiliated Hospital of Nanjing Medical University, Nanjing, People's Republic of China
3. Department of Cardiothoracic Surgery, Jinling Hospital, Medical School of Nanjing University, Nanjing, People's Republic of China