1. Department of Gastroenterology & Hepatology, Chinese PLA General Hospital, Beijing 100853, China
2. Department of Molecular Biology, Institute of Basic Medicine, School of Life Sciences, Chinese PLA General Hospital, Beijing 100853, China
3. Medical College of NanKai University, Tianjin 300071, China
4. The Hillman Cancer Center, University of Pittsburgh Cancer Institute, Pittsburgh, PA 15213, U.S.A
5. Laboratory of Cancer Epigenetics, Free University of Brussels (U.L.B.), 808 route de Lennik, Brussels 1070, Belgium
6. Central Laboratory, The Affiliated Hainan Hospital of Chinese PLA General Hospital, Hai Tang Wan, Sanya 572013, China