1. Department of Thoracic Surgery, XinHua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai 200092, P.R. China
2. Department of Geriatrics, The First Hospital of Jilin University, Changchun, Jilin 130021, P.R. China
3. Department of Tumor and Blood Disease, The Affiliated Hospital to Changchun University of Chinese Medicine, Changchun, Jilin 130021, P.R. China
4. Department of Infections, People's Hospital of Jilin Province, Changchun, Jilin 130021, P.R. China