1. Department of Clinical Laboratory, The 954th Army Hospital, Shannan, P.R. China.
2. Department of Ultrasonography, The 954th Army Hospital, Shannan, P.R. China.
3. State Key Laboratory of Proteomics, National Center for Protein Sciences, Beijing Institute of Radiation Medicine, Beijing, P.R. China.
4. Department of Gastroenterology, The 954th Army Hospital, Shannan, P.R. China.