1. Department of Medical Examination, The Affiliated Huai’an No. 1 People’s Hospital of Nanjing Medical University , Huai’an , Jiangsu 223300 , P.R. China
2. Department of Pathology, The Affiliated Huai’an No. 1 People’s Hospital of Nanjing Medical University , Huai’an , Jiangsu 223300 , P.R. China
3. Department of Respiration, The Affiliated Huai’an No. 1 People’s Hospital of Nanjing Medical University , No. 1, Huanghexi Road, Huaiyin District , Huai’an , Jiangsu 223300 , P.R. China