1. Department of Digestion, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215006, P.R. China
2. Hematological Disease Engineering Center of Ministry of Education, Soochow University, Suzhou, Jiangsu 215006, P.R. China
3. Department of Thoracic Surgery, The First Hospital of Handan City, Handan, Hebei 056002, P.R. China