1. Department of Medical Records, The Third Affiliated Hospital of Nanjing University of Chinese Medicine, Nanjing, Jiangsu 210001, P.R.�China
2. Department of General Surgery, Xi Jing Hospital, Fourth Military Medical University, Xi'an, Shaanxi 710032, P.R. China
3. Department of Respiratory Medicine, The Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, Jiangsu 210008, P.R. China
4. Department of Oncology, The�First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210029, P.R.�China