1. Medical Research Center, The Affiliated Hospital of Nanjing Medical University, Changzhou No.2 People's Hospital; Changzhou 213003 China
2. Department of Oncology; The Affiliated Hospital of Nanjing Medical University, Changzhou No.2 People's Hospital; Changzhou 213003 China
3. Department of General Surgery; The Affiliated Hospital of Nanjing Medical University, Changzhou No.2 People's Hospital; Changzhou 213003 China
4. Section of Clinical Chemistry & Pharmacology, Department of Laboratory Medicine; Lund University; Lund S-221 85 Sweden